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t
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J
-
AI
)
Vo
l.
9
,
No
.
3
,
Sep
tem
b
er
2020
,
p
p
.
497
~
506
I
SS
N:
2252
-
8938
,
DOI
: 1
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5
9
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2
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[
3
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.
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8938
I
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t J
A
r
ti
f
I
n
tell
,
Vo
l.
9
,
No
.
3
,
Sep
te
m
b
er
20
20
:
4
9
7
–
50
6
498
o
f
li
n
k
ed
v
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tices
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.
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3
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.
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v
ar
io
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s
i
m
p
r
o
v
e
m
e
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ts
[
4
-
5
]
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s
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r
ap
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s
ee
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s
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ter
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n
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s
u
a
ll
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et
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[
6
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ar
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ip
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titi
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[
7
-
8]
.
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s
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ter
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: T
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m
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Gr
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Gr
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to
m
a
n
y
d
is
cip
li
n
es
[
7
]
.
A
g
r
ap
h
h
as
v
er
tice
s
co
n
n
ec
ted
to
g
et
h
er
b
y
ed
g
e
s
to
y
ield
s
y
s
te
m
t
h
at
r
ep
r
esen
ts
i
n
ter
ac
tio
n
s
f
o
r
th
e
task
.
So
cial
g
r
ap
h
s
co
n
s
is
t
o
f
v
er
tice
s
r
ep
r
esen
tin
g
ac
to
r
s
o
r
ag
en
ts
;
w
h
ile,
ed
g
es
r
ep
r
esen
t
w
eig
h
ted
r
elatio
n
s
h
ip
s
s
h
ar
ed
b
et
w
ee
n
th
e
s
e
ac
to
r
s
.
T
h
u
s
,
g
r
ap
h
a
n
al
y
s
i
s
s
t
u
d
ies
n
o
d
al
r
elatio
n
s
h
ip
s
v
ia
t
h
e
f
o
r
m
atio
n
o
f
n
o
d
e
clu
s
ter
s
as
it
ef
f
ec
ts
t
h
e
s
y
s
te
m
.
A
p
o
w
er
f
u
l
r
o
le
o
f
g
r
ap
h
s
(
as
n
et
w
o
r
k
s
)
is
to
b
r
id
g
e
lo
ca
l
f
ea
ts
t
h
at
ex
i
s
t
in
n
o
d
es
as
th
e
y
b
l
o
s
s
o
m
s
i
n
t
o
p
atter
n
s
th
a
t
h
elp
s
e
x
p
lain
h
o
w
n
o
d
es
an
d
th
eir
co
r
r
esp
o
n
d
in
g
ed
g
e
s
i
m
p
ac
t
s
a
co
m
p
lex
e
f
f
ec
t
th
at
r
ip
p
le
v
i
a
th
e
g
r
ap
h
[
9
-
1
0
]
.
A
g
r
ap
h
is
g
r
ap
h
icall
y
r
ep
r
esen
ted
a
s
n
e
t
w
o
r
k
o
f
n
o
d
es,
an
d
m
at
h
e
m
atica
ll
y
d
e
n
o
ted
as
G
=
(
V,
E
,
w
)
–
w
h
er
e
v
r
e
p
r
esen
t
s
a
s
et
o
f
v
er
tice
s
(
n
o
d
es,
ac
to
r
s
,
ag
e
n
ts
)
,
E
r
e
p
r
esen
ts
t
h
e
s
et
o
f
lin
k
s
/r
elatio
n
s
a
n
d
ar
cs;
w
h
ile,
(
o
p
tio
n
al)
w
r
ep
r
esen
ts
w
ei
g
h
ts
o
f
ea
c
h
n
o
d
e.
E
ac
h
n
o
d
e
i
V
h
a
s
a
s
et
o
f
tie
s
m
E
th
at
i
s
eit
h
er
s
el
f
-
l
in
k
ed
,
s
in
g
le
-
li
n
k
ed
o
r
m
u
lti
-
li
n
k
ed
.
T
h
e
lin
k
s
ar
e
eit
h
er
w
ea
k
o
r
s
tr
o
n
g
s
tr
e
s
s
i
n
g
th
e
s
o
cial
r
elatio
n
s
h
ip
b
et
w
ee
n
s
u
ch
n
o
d
es a
s
m
ea
s
u
r
ed
v
ia
d
y
a
d
s
D
[
1
1
]
.
T
h
er
e
ar
e
t
w
o
k
i
n
d
s
o
f
s
o
ci
al
g
r
ap
h
n
a
m
el
y
in
th
e
lig
h
t
o
f
s
o
cial
d
is
c
u
s
s
n
a
m
el
y
:
e
x
pli
cit
a
n
d
i
m
pli
cit
g
r
ap
h
r
elat
io
n
s
h
ip
.
T
h
e
im
p
licit
g
r
ap
h
d
e
s
cr
ib
es
an
i
n
ter
ac
tio
n
b
et
w
ee
n
u
s
er
s
,
th
eir
co
n
tacts
a
n
d
g
r
o
u
p
o
f
co
n
tacts.
I
t
d
e
f
in
e
s
a
g
r
ap
h
w
h
o
s
e
v
er
tices
ar
e
n
o
t
r
ep
r
esen
ted
as
e
x
p
licit
d
ata
o
b
j
ec
ts
in
m
e
m
o
r
y
;
B
u
t
r
ath
er
,
ar
e
d
eter
m
in
ed
al
g
o
r
ith
m
ica
ll
y
f
r
o
m
s
o
m
e
m
o
r
e
co
n
cise
in
p
u
ts
.
I
t
is
also
a
g
r
a
p
h
w
h
o
s
e
ed
g
es
ar
e
w
ei
g
h
ed
b
y
f
ea
ts
s
u
c
h
as
f
r
e
q
u
en
c
y
,
r
ec
e
n
c
y
,
an
d
d
ir
ec
tio
n
o
f
in
ter
ac
t
io
n
b
et
w
ee
n
u
s
er
s
an
d
th
eir
co
n
tact
s
an
d
th
eir
g
r
o
u
p
o
f
co
n
tact
s
.
T
h
ey
ar
e
u
s
ed
to
id
en
tify
clu
s
ter
s
o
f
co
n
tacts
w
h
o
f
o
r
m
g
r
o
u
p
s
t
h
at
ar
e
m
ea
n
in
g
f
u
l
an
d
u
s
e
f
u
l
to
ea
ch
u
s
er
[
1
]
.
C
o
n
v
er
s
el
y
,
ex
p
licit
g
r
ap
h
s
ar
e
s
u
c
h
th
at
t
w
o
-
in
d
i
v
id
u
als
d
elib
er
atel
y
an
d
m
u
t
u
all
y
d
escr
ib
e
t
h
eir
co
n
n
ec
t
io
n
w
i
th
o
n
e
a
n
o
th
er
.
T
h
u
s
,
s
u
c
h
g
r
ap
h
s
ca
n
b
e
m
i
n
ed
m
o
r
e
ea
s
il
y
,
s
i
n
ce
th
e
y
b
e
g
i
n
w
it
h
h
ar
d
d
ata,
an
d
n
o
t
alg
o
r
ith
m
s
t
h
at
w
i
ll
b
e
h
ar
d
f
o
r
co
m
p
etito
r
s
to
r
ep
licate
in
th
e
f
u
t
u
r
e.
I
t
is
b
est
u
n
d
er
s
to
o
d
as
tr
u
l
y
p
er
s
o
n
al
a
n
d
s
o
cial
[
1
2
]
.
T
h
u
s
,
ex
p
licit
g
r
ap
h
s
ar
e
r
ar
e
an
d
ex
a
m
p
le
s
i
n
clu
d
e
Face
b
o
o
k
an
d
L
i
n
k
ed
I
n
.
Gen
er
all
y
,
g
r
o
u
p
s
c
h
an
g
e
d
y
n
a
m
ical
l
y
as
n
e
w
u
s
er
s
ar
e
ad
d
ed
t
o
m
u
lti
-
p
ar
t
y
co
m
m
u
n
icat
io
n
th
r
ea
d
s
;
w
h
ile,
o
th
er
s
ar
e
als
o
r
e
m
o
v
ed
.
T
h
u
s
,
a
p
er
s
o
n
’
s
in
d
i
v
id
u
al
r
elatio
n
s
h
ip
d
y
n
a
m
icall
y
e
v
o
l
v
e
a
n
d
ch
an
g
es
o
v
er
ti
m
e
as
a
f
r
ien
d
b
ec
o
m
es
o
n
e’
s
f
a
m
il
y
,
a
c
o
lleag
u
e
b
ec
o
m
e
s
a
f
r
ien
d
,
a
f
r
ien
d
b
ec
o
m
e
s
a
co
lleag
u
e
etc.
T
h
e
n
ee
d
to
co
n
s
is
ten
tl
y
u
p
d
ate
all
th
e
r
elatio
n
s
h
ip
s
a
u
s
er
h
as
w
it
h
h
is
/
h
er
co
n
tacts,
r
eq
u
ir
e
co
n
s
tan
t
m
ai
n
ten
a
n
ce
.
T
h
is
is
q
u
ite
ted
io
u
s
an
d
ti
m
e
co
n
s
u
m
i
n
g
[
3
]
.
P
r
ev
io
u
s
s
t
u
d
ies
h
av
e
u
s
ed
m
a
n
y
m
o
d
el
s
–
an
d
at
th
e
f
r
o
n
tier
o
f
th
ese
i
s
th
e
f
r
ie
nd
s
ug
g
est a
lg
o
r
ith
m
,
w
h
ic
h
as
s
is
t
s
u
s
er
s
i
n
cr
ea
tio
n
o
f
cu
s
to
m
co
n
tacts t
h
at
ar
e
eith
er
i
m
p
lici
t o
r
ex
p
licit.
T
r
av
er
s
in
g
co
n
tact
s
o
n
a
s
o
cia
l g
r
ap
h
s
Gr
ap
h
b
in
d
s
n
o
d
es
to
g
eth
er
t
h
r
o
u
g
h
a
p
r
ed
ef
in
ed
m
o
d
el
s
o
th
at
a
r
esear
ch
er
ca
n
ef
f
ec
ti
v
el
y
a
n
al
y
ze
its
e
n
titi
e
s
alo
n
g
s
o
m
e
t
h
eo
r
ies
to
e
x
p
lain
t
h
e
o
b
s
er
v
ed
p
a
tter
n
s
w
it
h
i
n
[
1
3
-
1
6
]
.
T
h
u
s
,
it
h
elp
s
to
p
r
o
p
ag
ate
lo
ca
l
f
ea
ts
p
r
esen
t
in
n
o
d
es
t
h
at
e
v
en
t
u
all
y
e
m
er
g
e
as
g
lo
b
al
p
atter
n
s
.
I
t
ex
a
m
i
n
e
d
y
n
a
m
ics
in
r
elatio
n
s
h
ip
b
et
w
ee
n
n
o
d
es
as
w
e
ll
as
h
elp
s
to
lo
ca
te
all
th
e
in
f
l
u
en
t
ial
en
titi
e
s
w
ith
in
s
u
c
h
a
n
et
w
o
r
k
–
as
it
th
eo
r
etica
ll
y
,
allo
w
s
co
n
n
ec
t
io
n
co
n
v
er
g
e
n
c
e
o
f
n
o
d
es
[
1
1
]
.
A
p
o
w
er
f
u
l
r
o
le
o
f
g
r
ap
h
is
to
b
r
id
g
e
lo
ca
l
u
n
d
er
l
y
in
g
f
ea
tu
r
e
s
as
th
e
y
b
lo
s
s
o
m
s
i
n
to
g
lo
b
al
n
et
w
o
r
k
p
atter
n
s
.
T
h
er
eb
y
,
e
x
p
lain
i
n
g
h
o
w
s
i
m
p
le
n
o
d
al
r
elat
io
n
s
h
ip
s
i
m
p
ac
t
o
n
co
m
p
l
e
x
e
f
f
ec
t,
w
h
ic
h
ev
e
n
t
u
all
y
r
ip
p
les
th
r
o
u
g
h
o
u
t
t
h
e
n
et
w
o
r
k
c
u
m
p
o
p
u
latio
n
s
y
s
te
m
.
E
ac
h
n
o
d
e,
s
h
ap
es
th
e
g
r
ap
h
’
s
ev
o
l
u
tio
n
as
t
h
e
n
ee
d
ar
is
es.
T
h
u
s
,
s
o
cial
g
r
ap
h
s
ai
m
at
t
w
o
g
o
als
n
a
m
el
y
:
(
a)
b
etter
u
n
d
er
s
tan
d
h
o
w
n
et
w
o
r
k
s
ev
o
l
v
e,
a
n
d
(
b
)
s
t
u
d
y
d
ep
en
d
e
n
t
s
o
cial
p
r
o
ce
s
s
es
li
k
e
i
n
n
o
v
atio
n
d
if
f
u
s
io
n
an
d
d
ata
r
etr
ie
v
al
v
ia
m
o
d
els to
s
p
ec
i
f
y
h
o
w
lo
c
al
in
ter
ac
tio
n
o
f
ag
e
n
ts
’
f
ea
ts
ar
e
ex
p
lo
r
ed
to
a
g
lo
b
al
p
atter
n
[
5
,
8
,
1
1
]
.
T
h
e
im
p
lic
it f
r
ie
n
d
s
h
ip
s
u
g
g
es
t a
lg
o
r
ith
m
E
x
ten
d
i
n
g
[
1
]
b
ased
o
n
g
r
ap
h
th
eo
r
ies
i
n
[
8
]
,
w
e
ex
p
lo
r
e
t
h
e
f
r
ie
n
d
s
u
g
g
est
al
g
o
r
ith
m
,
w
h
i
ch
p
r
o
b
es
th
e
p
r
ese
n
ce
o
f
i
m
p
licit
cl
u
s
ter
in
g
i
n
a
u
s
er
’
s
e
g
o
ce
n
tr
ic
n
et
w
o
r
k
o
b
s
er
v
i
n
g
g
r
o
u
p
s
o
f
co
n
tacts
w
h
o
ar
e
f
r
eq
u
en
tl
y
p
r
esen
t
as
co
–
r
ec
ip
ien
ts
in
s
a
m
e
e
m
ail
th
r
ea
d
s
.
F
S
A
f
u
n
ctio
n
s
w
i
th
i
n
t
h
e
e
g
o
c
en
tr
ic
n
et
w
o
r
k
–
to
s
u
g
g
e
s
t
b
ased
o
n
l
y
o
n
u
s
er
’
s
l
o
ca
l
d
ata
s
o
as
to
p
r
o
tect
u
s
er
p
r
iv
ac
y
a
n
d
a
v
o
id
ex
p
o
s
i
n
g
c
o
n
n
ec
tio
n
s
b
et
w
ee
n
th
e
u
s
er
’
s
co
n
tacts
t
h
at
m
a
y
n
o
t
o
th
er
w
i
s
e
h
a
v
e
b
ee
n
id
en
ti
f
ied
to
h
i
m
.
I
n
p
u
ts
to
th
e
FS
A
is
a
s
ee
d
s
e
t
(
o
n
e
o
r
m
o
r
e
co
n
tact
s
t
h
at
b
elo
n
g
t
o
a
p
ar
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lar
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Evaluation Warning : The document was created with Spire.PDF for Python.
I
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tell
I
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N:
2252
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8938
I
n
tellig
en
t c
lu
s
ter co
n
n
ec
t
io
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i
s
t reco
mme
n
d
er sys
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u
s
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g
.
.
.
(
A
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Oju
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499
co
n
tacts.
G
iv
e
n
t
h
i
s
,
th
e
FS
A
f
i
n
d
s
t
h
e
co
n
tacts
in
t
h
e
u
s
er
’
s
e
g
o
ce
n
tr
ic
n
e
t
w
o
r
k
t
h
at
ar
e
r
elate
d
to
th
e
s
ee
d
(
co
n
tacts p
r
esen
t i
n
t
h
e
s
a
m
e
i
m
p
licit c
l
u
s
ter
)
.
Frie
n
d
s
s
u
g
g
e
s
t a
ls
o
r
etu
r
n
s
a
s
co
r
e
f
o
r
ea
ch
s
u
g
g
e
s
ted
co
n
tact,
in
d
icati
n
g
t
h
e
g
o
o
d
n
e
s
s
o
f
it
s
f
it
to
th
e
e
x
is
tin
g
s
ee
d
.
T
h
e
FS
A
is
ap
p
licab
le
to
p
r
o
b
lem
s
o
f
g
r
o
u
p
clu
s
ter
in
g
in
w
h
ich
t
h
e
i
n
ter
ac
tio
n
i
s
b
as
ed
o
n
s
o
cial
g
r
ap
h
.
2.
M
AT
E
RIAL
S
AND
M
E
T
H
O
DS
2
.
1
.
St
a
t
e
m
ent
o
f
p
ro
ble
m
T
h
e
f
o
llo
w
i
n
g
p
r
o
b
le
m
s
ar
e
to
b
e
ad
d
r
ess
ed
:
1.
Ma
n
u
a
l
cr
ea
tio
n
o
f
g
r
o
u
p
s
f
r
o
m
u
s
er
co
n
tact
s
is
q
u
ite
ti
m
e
co
n
s
u
m
in
g
as
t
h
e
u
s
er
m
u
s
t
d
elib
er
atel
y
id
en
ti
f
y
cl
u
s
ter
s
f
r
o
m
h
i
s
/h
er
c
o
n
tact
lis
t
s
o
as to
cr
ea
te
th
e
r
eq
u
ir
ed
g
r
o
u
p
s
.
2.
T
h
e
d
y
n
a
m
ic
n
atu
r
e
o
f
s
o
cial
g
r
o
u
p
s
esp
ec
ial
l
y
w
it
h
t
h
e
ad
d
itio
n
,
d
eletio
n
a
n
d
a
m
e
n
d
i
n
g
o
f
r
elatio
n
s
h
ip
s
etc,
u
s
er
s
o
f
te
n
m
an
u
all
y
h
an
d
le
s
u
c
h
u
p
d
ates o
f
c
u
s
to
m
g
r
o
u
p
s
.
3.
Stu
d
y
s
ee
k
s
to
tack
le
t
h
e
ab
o
v
e
p
r
o
b
lem
b
y
u
s
in
g
a
n
i
m
p
lic
it
s
o
cial
g
r
ap
h
v
ia
a
f
r
ien
d
s
s
u
g
g
est al
g
o
r
ith
m
.
T
h
e
s
tu
d
y
s
ee
k
s
to
i
m
p
le
m
en
t a
f
r
ien
d
s
u
g
g
e
s
t a
l
g
o
r
ith
m
v
ia
th
e
i
m
p
licit so
cial
g
r
ap
h
m
o
d
e
l th
at
w
il
l
au
to
m
at
icall
y
h
elp
u
s
er
s
cr
ea
t
e
cu
s
to
m
co
n
tact
in
t
h
eir
p
h
o
n
eb
o
o
k
.
T
h
is
w
ill
in
te
lli
g
en
t
l
y
h
elp
u
s
er
s
eli
m
in
a
te
ti
m
e
s
p
e
n
t
to
m
a
n
u
al
l
y
cr
ea
te
th
eir
cu
s
to
m
co
n
tact
g
r
ap
h
.
Sp
ec
if
ic
g
o
als
in
c
lu
d
es
:
(
a)
to
d
escr
ib
e
an
in
ter
ac
tio
n
-
b
ased
m
etr
ic
f
o
r
esti
m
ati
n
g
a
u
s
er
’
s
af
f
i
n
it
y
to
h
is
co
n
tacts
an
d
g
r
o
u
p
s
[
1
7
]
,
(
b
)
im
p
le
m
e
n
t
t
h
e
f
r
ien
d
s
u
g
g
es
tio
n
al
g
o
r
ith
m
v
i
a
a
u
s
er
’
s
i
m
p
licit
s
o
cial
g
r
ap
h
an
d
th
u
s
,
g
e
n
er
ate
a
f
r
ien
d
g
r
o
u
p
,
g
iv
en
a
s
m
al
l
s
ee
d
s
et
o
f
co
n
tacts
w
h
ic
h
th
e
u
s
er
’
s
h
a
s
alr
ea
d
y
ca
te
g
o
r
ize
d
as
f
r
ien
d
s
an
d
also
to
s
u
g
g
e
s
t
f
r
ie
n
d
s
to
ex
p
an
d
th
e
s
ee
d
s
et
o
f
th
at
g
r
o
u
p
,
an
d
(
c)
d
em
o
n
s
tr
ate
th
e
i
m
p
o
r
tan
ce
o
f
b
o
th
th
e
i
m
p
licit
g
r
o
u
p
r
elatio
n
s
h
ip
an
d
th
e
in
ter
ac
tio
n
-
b
ased
af
f
i
n
it
y
r
an
k
in
g
i
n
s
u
g
g
e
s
ti
n
g
f
r
ien
d
s
[
1
8
]
.
2
.
2
.
Da
t
a
g
a
t
hering
T
h
e
s
tu
d
y
u
s
e
s
t
h
e
E
n
r
o
n
E
m
ail
C
o
r
p
u
s
Data
s
et
to
i
m
p
le
m
en
t
t
h
e
Frie
n
d
Su
g
g
est
Alg
o
r
it
h
m
(
FS
A
)
.
I
t
is
a
lar
g
e
co
llect
io
n
o
f
e
m
ail
m
e
s
s
a
g
es
o
f
th
e
E
n
r
o
n
C
o
r
p
o
r
ati
o
n
,
co
llected
in
Ho
u
s
to
n
i
n
2
0
0
2
b
y
J
o
e
B
ar
tin
g
,
to
an
al
y
ze
co
n
tr
ac
t
o
r
s
o
f
Asp
en
,
w
h
o
m
t
h
e
Fe
d
er
al
E
n
er
g
y
R
e
g
u
lato
r
y
C
o
m
m
is
s
io
n
h
ir
ed
to
p
r
eser
v
e
v
a
s
t
a
m
o
u
n
t
s
o
f
d
at
a
co
llected
d
u
r
in
g
th
e
le
g
al
in
v
e
s
ti
g
atio
n
o
f
t
h
e
E
n
r
o
n
a
cc
o
u
n
ti
n
g
f
r
au
d
i
n
Dec
e
m
b
er
2
0
0
1
.
I
t
co
n
tain
s
o
v
er
6
0
0
,
0
0
0
m
e
s
s
a
g
es
f
r
o
m
1
5
0
u
s
er
s
[
19
-
20]
.
Fo
r
th
e
s
tu
d
y
,
w
e
ad
o
p
t
s
in
g
l
e
u
s
er
(
i.e
.
an
e
m
p
lo
y
ee
)
e
m
a
il
ad
d
r
ess
–
s
in
ce
w
e
s
ee
k
a
u
s
e
r
’
eg
o
ce
n
tr
ic
n
et
w
o
r
k
.
E
ac
h
e
m
p
lo
y
ee
f
o
ld
er
i
n
th
e
d
ataset,
h
a
s
o
th
er
e
m
ai
l
f
o
ld
er
s
f
o
r
i
n
co
m
i
n
g
an
d
o
u
t
g
o
in
g
m
e
s
s
a
g
es.
Ou
r
c
h
o
s
e
n
e
m
p
lo
y
ee
is
S
h
ac
k
le
to
n
Sar
a
(
ch
o
s
e
n
b
ased
o
n
a
b
ala
n
ce
i
n
t
h
e
n
u
m
b
er
o
f
in
co
m
i
n
g
a
n
d
o
u
t
g
o
i
n
g
m
e
s
s
a
g
es)
as
s
h
o
w
n
i
n
F
ig
u
r
e
1.
T
h
e
r
atio
n
ale
f
o
r
th
e
ad
o
p
tio
n
o
f
th
e
d
atase
t
u
s
ed
,
is
b
ased
o
n
(
a)
s
tan
d
ar
d
e
m
ail
f
o
r
s
o
ci
al
n
et
w
o
r
k
a
n
al
y
s
i
s
,
(
b
)
d
ataset
ex
p
lo
r
es
t
h
e
b
en
ef
its
an
d
t
ie
-
s
tr
en
g
t
h
o
f
u
s
er
s
,
an
d
(
c)
t
h
e
d
ataset
in
co
r
p
o
r
ates
th
e
v
ar
io
u
s
co
m
p
o
n
e
n
t
s
m
e
tr
ics
to
b
e
m
ea
s
u
r
ed
f
o
r
th
e
f
r
ien
d
s
u
g
g
est
al
g
o
r
ith
m
.
Data
s
et
is
o
b
tain
ed
f
r
o
m
[
w
eb
]
:
h
ttp
://
www
.
c
s
.
c
m
u
.
ed
u
.
Fig
u
r
e
1
.
C
h
o
s
e
n
e
m
p
lo
y
ee
S
h
ac
k
le
to
n
Sar
a
w
it
h
i
n
co
m
i
n
g
an
d
o
u
tg
o
i
n
g
m
e
s
s
a
g
es
3.
RE
S
E
ARCH
M
E
T
H
O
D
T
h
e
g
en
er
al
ar
c
h
itect
u
r
e
o
f
t
h
e
p
r
o
p
o
s
ed
im
p
le
m
en
ted
s
y
s
t
e
m
,
ar
e
co
u
p
led
g
r
ap
h
t
h
eo
r
ie
s
m
o
d
eled
o
n
[
8
,
21
-
2
5
]
w
ith
a
v
ie
w
to
e
x
ten
d
[
1
]
as in
F
ig
u
r
e
2:
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8938
I
n
t J
A
r
ti
f
I
n
tell
,
Vo
l.
9
,
No
.
3
,
Sep
te
m
b
er
20
20
:
4
9
7
–
50
6
500
1.
C
lie
n
t
C
o
m
p
u
ter
–
is
a
n
y
d
e
v
ice
t
h
r
o
u
g
h
w
h
ich
a
u
s
er
c
an
s
u
b
m
it
s
er
v
ice
s
r
eq
u
est
t
o
an
d
r
ec
eiv
e
m
es
s
ag
i
n
g
s
er
v
ice
s
o
r
o
th
er
s
er
v
ices
f
r
o
m
t
h
e
s
er
v
er
s
y
s
te
m
.
E
x
a
m
p
les
ar
e
P
C
s
,
m
o
b
ile
d
ev
ices,
m
o
b
ile
p
h
o
n
es e
tc.
2.
C
o
m
m
u
n
ica
tio
n
Net
w
o
r
k
i
s
an
y
w
ir
ed
/
w
ir
eles
s
lo
ca
l
ar
ea
n
et
w
o
r
k
an
d
/o
r
w
id
e
ar
ea
n
et
w
o
r
k
o
r
its
co
m
b
i
n
a
tio
n
.
3.
Seed
Set Sele
cto
r
–
s
ee
k
s
to
s
e
lect
o
n
e
o
r
m
o
r
e
co
n
tact
s
f
r
o
m
th
e
d
ata
s
et
(
s
u
b
s
e
t)
as th
e
s
ee
d
s
et.
4.
Sco
r
e
C
o
n
tr
ib
u
tio
n
A
cc
u
m
u
lat
o
r
–
is
f
o
r
g
en
er
ati
n
g
s
co
r
es f
o
r
co
n
tacts in
th
e
g
r
o
u
p
o
f
co
n
t
ac
ts
,
th
e
s
ee
d
s
et
is
s
en
t
to
th
e
s
co
r
e
co
n
tr
ib
u
tio
n
ac
cu
m
u
lato
r
w
h
ic
h
u
s
es
d
ata
f
r
o
m
th
e
u
s
er
ac
co
u
n
t
d
ata
-
s
to
r
e
(
e.
g
.
g
r
o
u
p
o
f
co
n
tacts)
w
h
o
w
er
e
r
ec
ip
ien
ts
o
r
s
e
n
d
er
s
o
f
m
es
s
ag
e
s
to
g
e
n
er
ate
s
co
r
e
f
o
r
ea
ch
o
f
t
h
e
co
n
tacts i
n
th
e
g
r
o
u
p
o
f
co
n
ta
cts.
5.
C
o
n
tact
S
u
g
g
est
io
n
Gen
er
ato
r
g
en
er
ate
s
s
u
g
g
ested
co
n
tac
ts
b
a
s
ed
o
n
t
h
e
g
en
er
ated
s
co
r
e
d
ata.
I
t
in
cl
u
d
es
a
co
n
tact_
ad
d
s
u
g
g
est
f
u
n
ctio
n
f
o
r
s
u
g
g
es
tin
g
co
n
tact
s
to
ad
d
to
m
es
s
ag
e
s
an
d
a
co
n
tact_
r
e
m
o
v
e
s
u
g
g
est
f
u
n
ct
io
n
to
s
u
g
g
e
s
t
co
n
tac
ts
to
r
e
m
o
v
e.
I
t
r
ec
ei
v
es
all
t
h
e
g
en
e
r
ated
s
co
r
es
to
g
en
er
ate
s
u
g
g
e
s
tio
n
s
i
n
clu
d
i
n
g
co
n
tact
s
f
r
o
m
t
h
e
g
r
o
u
p
o
f
co
n
tacts.
6.
User
A
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o
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n
t
Data
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ase
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to
r
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s
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(
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a
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t
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u
m
u
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n
ter
ac
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R
an
k
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ato
r
–
g
en
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m
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tan
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f
a
g
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p
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f
co
n
tacts to
u
s
er
.
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n
ter
ac
tio
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R
a
n
k
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b
a
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s
to
r
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ter
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tio
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d
ata
g
en
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ated
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e
I
n
te
r
ac
tio
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an
k
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er
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r
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h
e
s
co
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tr
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b
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tio
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m
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lato
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w
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t
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s
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s
to
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ated
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p
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Fig
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m
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m
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ail
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ter
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Fro
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1
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,
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ter
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tio
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m
t
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cu
r
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t
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;
w
h
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s
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ter
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o
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e
r
ec
ency
m
etr
ic
p
r
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p
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ed
b
y
[
1
7
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.
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u
s
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m
p
u
tes
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w
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ased
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r
o
u
p
s
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ac
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g
h
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ll
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p
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s
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ter
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r
th
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[
1
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au
g
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ted
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m
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ter
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s
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B
u
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ta
k
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co
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t
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t
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PD
ATE
S
C
O
RE(
c
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T
h
e
E
XP
A
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D
f
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r
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h
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u
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th
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th
at
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a
m
e
m
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g
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h
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o
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m
d
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t
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g
est
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t
h
at
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y
m
e
m
b
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s
o
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ted
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ia
a
h
el
p
er
f
u
n
ctio
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,
UP
D
A
T
E
SC
OR
E
,
w
h
ic
h
tak
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s
t
h
e
co
n
tact
b
e
in
g
co
n
s
id
er
ed
,
th
e
co
n
tact's
s
co
r
e
s
o
f
ar
,
F
[
c]
,
th
e
s
ee
d
S
,
an
d
th
e
g
r
o
u
p
g
.
I
n
th
e
f
o
llo
w
i
n
g
s
ec
tio
n
,
w
e
d
is
c
u
s
s
s
ev
er
al
p
o
s
s
ib
le
s
co
r
in
g
h
eu
r
i
s
tics
t
h
at
wer
e
co
n
s
id
er
ed
f
o
r
UP
DA
T
E
S
C
OR
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.
3
.
3
.
T
he
s
co
ring
f
un
ct
io
n
T
h
e
Up
d
ate_
Sco
r
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is
a
f
u
n
c
tio
n
p
atter
n
t
h
at
ta
k
es
a
s
i
n
g
le
co
n
tact
c
,
f
r
o
m
a
u
s
er
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eg
o
ce
n
tr
ic
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et
w
o
r
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d
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m
p
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p
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n
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n
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cr
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m
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co
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ased
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e
g
r
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p
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s
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ee
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g
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p
S
.
T
h
e
s
u
m
o
f
Up
d
ate_
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r
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f
o
r
a
co
n
tact
c
co
v
er
s
al
l
o
f
th
e
i
m
p
l
icit
g
r
o
u
p
s
to
w
h
ic
h
it
(
c
)
b
elo
n
g
s
.
T
h
u
s
,
it
is
an
ev
al
u
atio
n
o
f
c
'
s
s
u
itab
ilit
y
to
ex
p
an
d
th
e
s
ee
d
–
s
in
c
e
b
o
th
th
e
i
m
p
licit
g
r
o
u
p
s
cr
ea
tin
g
u
p
a
u
s
er
’
s
eg
o
ce
n
tr
ic
n
et
w
o
r
k
as
w
ell
as
s
ee
d
g
r
o
u
p
in
p
u
tted
to
th
e
Frie
n
d
S
u
g
g
es
t
A
l
g
o
r
ith
m
,
ar
e
u
n
o
r
d
er
e
d
s
ets
o
f
co
n
tact
s
(
w
h
ich
ca
n
b
e
co
m
p
ar
ed
v
ia
s
tan
d
ar
d
m
ea
s
u
r
e
s
o
f
s
et
co
n
n
ec
tio
n
)
.
Ho
w
e
v
er
,
w
e
c
h
o
o
s
e
f
o
r
th
i
s
s
t
u
d
y
–
a
s
et
m
e
m
b
er
in
t
er
s
ec
tio
n
to
y
ie
ld
th
e
v
ar
io
u
s
v
er
s
io
n
s
o
f
th
e
Up
d
ate_
Sco
r
e
Fu
n
ctio
n
,
lea
v
i
n
g
m
o
r
e
co
m
p
o
s
ite
m
e
tr
ics
f
o
r
f
u
t
u
r
e
s
u
r
v
e
y
.
T
he
I
nte
rsect
i
ng
G
ro
up
Sc
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re
–
I
m
p
le
m
e
n
t
s
Up
d
ate_
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co
r
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f
u
n
ctio
n
t
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at
s
u
m
s
t
h
e
s
co
r
es
o
f
all
o
f
t
h
e
g
r
o
u
p
s
to
w
h
ic
h
t
h
at
b
elo
n
g
s
,
f
o
r
g
r
o
u
p
s
t
h
at
h
a
v
e
a
n
o
n
-
e
m
p
t
y
i
n
ter
s
ec
tio
n
w
it
h
t
h
e
s
ee
d
.
T
h
e
alg
o
r
ith
m
i
s
as th
u
s
:
Evaluation Warning : The document was created with Spire.PDF for Python.
I
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2
2
5
2
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I
n
t J
A
r
ti
f
I
n
tell
,
Vo
l.
9
,
No
.
3
,
Sep
te
m
b
er
20
20
:
4
9
7
–
50
6
502
Fu
n
c
t
i
o
n
I
n
t
e
rse
c
t
_
G
r
o
u
p
_
S
c
o
r
e
(
c
,
s
,
g
)
I
n
p
u
t
:
c
,
a
si
n
g
l
e
c
o
n
t
a
c
t
S
i
s t
h
e
se
e
d
b
e
i
n
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e
x
p
a
n
d
e
d
g
,
a
s
i
n
g
l
e
c
o
n
t
a
c
t
g
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p
Re
t
u
r
n
s:
g
’
s
c
o
n
t
ri
b
u
t
i
o
n
t
o
c
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s s
t
o
re
I
f
g
∩
S
≠
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ret
u
rn
I
R(
g
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El
se;
ret
u
rn
0
I
n
tu
i
tiv
e
l
y
,
I
n
ter
s
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t_
Gr
o
u
p
_
Sco
r
e
f
i
n
d
s
all
co
n
te
x
ts
in
w
h
ic
h
t
h
e
co
n
tact
c
e
x
c
h
an
g
ed
e
m
a
il
s
(
o
r
is
co
-
r
ec
ip
ien
t)
w
ith
a
t
le
ast
o
n
e
s
ee
d
g
r
o
u
p
m
e
m
b
er
.
B
u
t,
lar
g
er
in
ter
s
ec
tio
n
s
b
etw
ee
n
t
h
e
m
e
m
b
er
s
o
f
t
h
e
s
ee
d
g
r
o
u
p
an
d
t
h
e
m
e
m
b
er
s
o
f
a
g
iv
e
n
i
m
p
licit
g
r
o
u
p
,
w
ill
s
ee
m
s
to
in
d
icate
a
h
i
g
h
er
d
eg
r
ee
o
f
s
i
m
ilar
it
y
.
T
he
I
nte
rsect
Weig
hte
d
Sc
o
re
im
p
le
m
e
n
ts
t
h
e
Up
d
ate_
Sco
r
e
an
d
s
u
m
s
t
h
e
s
co
r
es
o
f
all
g
r
o
u
p
s
w
it
h
a
n
o
n
-
e
m
p
t
y
i
n
ter
s
ec
tio
n
w
it
h
t
h
e
s
ee
d
,
w
eig
h
ted
b
y
t
h
e
s
ize
o
f
th
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i
n
ter
s
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tio
n
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d
a
co
n
s
tan
t
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h
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lar
g
er
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ter
s
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tio
n
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et
w
ee
n
t
h
e
m
e
m
b
er
s
o
f
th
e
s
ee
d
g
r
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u
p
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d
t
h
e
m
e
m
b
er
s
o
f
a
g
iv
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n
i
m
p
lici
t
g
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p
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u
s
ed
to
g
en
er
ate
a
lar
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er
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ib
u
tio
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to
th
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s
co
r
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f
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r
ea
ch
n
o
n
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s
ee
d
m
e
m
b
er
o
f
t
h
e
i
m
p
licit
g
r
o
u
p
.
Fu
n
c
t
i
o
n
I
n
t
e
rse
c
t
_
W
e
i
g
h
t
e
d
_
S
c
o
re
(
c
,
S
,
g
)
:
I
n
p
u
t
:
c
,
a
s
i
n
g
l
e
c
o
n
t
a
c
t
S
i
s t
h
e
se
e
d
b
e
i
n
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e
x
p
a
n
d
e
d
g
,
a
s
i
n
g
l
e
c
o
n
t
a
c
t
g
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p
Re
t
u
r
n
s:
g
’
s
c
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n
t
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c
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r
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ret
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rn
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R(
g
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X
k
|
g
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nte
rsect
ing
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ro
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p
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un
t
–
im
p
le
m
e
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ts
a
n
Up
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ate_
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f
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n
ctio
n
t
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at
co
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n
ts
t
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e
n
u
m
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o
f
g
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p
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to
w
h
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h
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co
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elo
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g
s
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d
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o
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g
r
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s
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h
at
h
av
e
a
n
o
n
-
e
m
p
t
y
in
ter
s
ec
tio
n
w
i
th
th
e
s
ee
d
.
T
h
u
s
,
t
h
e
r
o
u
ti
n
e
co
u
n
t
s
t
h
e
n
u
m
b
er
o
f
g
r
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u
p
s
a
co
n
tact
c
b
elo
n
g
s
to
,
th
at
h
a
v
e
s
o
m
e
in
ter
s
ec
tio
n
w
it
h
t
h
e
s
ee
d
S
.
T
h
is
m
etr
ic
ig
n
o
r
es
t
h
e
I
n
ter
ac
tio
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s
R
an
k
en
tire
l
y
,
an
d
tr
ea
ts
all
i
m
p
licit
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r
o
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p
s
as
h
a
v
i
n
g
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u
al
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e
to
th
e
u
s
er
.
I
t
also
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tes
th
e
i
m
p
o
r
tan
ce
o
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u
s
in
g
a
s
ee
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f
co
n
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s
to
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ar
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ter
ize
a
d
is
tin
ct
f
r
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g
r
o
u
p
.
An
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o
,
w
e
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m
p
ar
e
its
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al
u
e
s
to
th
e
Up
d
ate_
Sco
r
e
in
s
tan
tiatio
n
,
w
h
i
c
h
ig
n
o
r
es
th
e
s
ee
d
an
d
al
w
a
y
s
s
u
g
g
es
ts
th
e
to
p
-
r
an
k
ed
co
n
tacts.
C
o
n
tac
t r
an
k
s
ar
e
co
m
p
u
ted
b
y
s
u
m
m
i
n
g
t
h
e
I
n
ter
ac
tio
n
s
R
a
n
k
s
o
f
i
m
p
li
cit
g
r
o
u
p
co
n
tai
n
i
n
g
ea
ch
co
n
tact.
I
n
ea
c
h
m
e
tr
ic,
th
e
f
in
al
f
r
ie
n
d
s
u
g
g
esti
o
n
s
c
o
r
es
ar
e
n
o
r
m
al
ized
w
i
th
r
esp
ec
t
to
th
e
h
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g
h
est
-
r
an
k
ed
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n
tact,
s
o
t
h
at
a
s
i
n
g
l
e
th
r
es
h
o
ld
ca
n
b
e
u
s
ed
ac
r
o
s
s
all
u
s
er
s
,
to
c
u
t
o
f
f
t
h
e
lis
t
o
f
s
u
g
g
e
s
ted
co
n
tact
s
.
T
h
e
alg
o
r
ith
m
i
s
as t
h
u
s
:
Fu
n
c
t
i
o
n
I
n
t
e
rse
c
t
_
G
r
o
u
p
_
C
o
u
n
t
(
c
,
S
,
g
)
I
n
p
u
t
:
c
,
a
si
n
g
l
e
c
o
n
t
a
c
t
S
i
s t
h
e
se
e
d
b
e
i
n
g
e
x
p
a
n
d
e
d
g
,
a
s
i
n
g
l
e
c
o
n
t
a
c
t
g
r
o
u
p
Re
t
u
r
n
s:
g
’
s
c
o
n
t
ri
b
u
t
i
o
n
t
o
c
’
s s
c
o
r
e
i
f
g
∩
S
≠
∅
ret
u
rn
1
e
l
se;
ret
u
rn
0
T
o
p
Co
nta
ct
Sco
re
-
T
h
is
f
u
n
ctio
n
i
m
p
le
m
en
ts
Up
d
ate_
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r
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r
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tin
e
th
at
s
ee
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s
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co
m
p
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tes
th
e
I
n
ter
ac
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n
s
R
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k
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a
s
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n
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co
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u
m
m
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g
t
h
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s
co
r
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o
f
all
o
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th
e
g
r
o
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p
s
to
w
h
ic
h
t
h
at
co
n
tact
b
elo
n
g
s
.
T
h
e
alg
o
r
ith
m
i
s
as t
h
u
s
:
Fu
n
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t
i
o
n
T
o
p
_
C
o
n
t
a
c
t
_
S
c
o
re
(
c
,
S
,
g
)
;
I
n
p
u
t
:
c
,
a
si
n
g
l
e
c
o
n
t
a
c
t
S
i
s t
h
e
se
e
d
b
e
i
n
g
e
x
p
a
n
d
e
d
g
,
a
s
i
n
g
l
e
c
o
n
t
a
c
t
g
r
o
u
p
Re
t
u
r
n
s:
a
n
u
p
d
a
t
e
d
r
a
n
k
f
o
r
t
h
e
c
o
n
t
a
c
t
C
ret
u
rn
I
R(
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T
h
e
s
y
s
te
m
id
en
t
if
ies,
i
n
h
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s
t
o
r
ical
co
m
m
u
n
ica
tio
n
s
in
a
u
s
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co
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n
t
a
s
s
o
ciate
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w
it
h
th
e
u
s
er
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o
n
e
o
r
m
o
r
e
g
r
o
u
p
s
o
f
co
n
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(
e.
g
.
,
ea
ch
g
r
o
u
p
o
f
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n
tac
ts
is
a
g
r
o
u
p
o
f
o
n
e
o
r
m
o
r
e
co
n
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s
ass
o
ciate
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w
it
h
a
p
ar
ticu
lar
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m
m
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n
icatio
n
)
.
Sy
s
te
m
g
en
er
ate
s
s
co
r
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f
o
r
co
n
tacts
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n
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en
ti
f
ied
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r
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r
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r
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p
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g
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u
s
i
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g
T
o
p
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n
tact_
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r
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n
ctio
n
)
.
T
h
e
s
y
s
te
m
Evaluation Warning : The document was created with Spire.PDF for Python.
I
n
t J
A
r
ti
f
I
n
tell
I
SS
N:
2252
-
8938
I
n
tellig
en
t c
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s
ter co
n
n
ec
t
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t reco
mme
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ies
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m
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e
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ted
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ce
w
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h
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ated
s
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id
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y
in
g
t
h
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n
tacts
t
h
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h
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e
th
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te
n
s
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es
as
ca
lc
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lated
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s
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g
t
h
e
T
o
p
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C
o
n
tact_
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r
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f
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n
ctio
n
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ter
id
en
ti
f
y
in
g
th
e
s
u
g
g
ested
co
n
tact
s
,
s
y
s
te
m
s
e
n
d
s
co
n
tact
s
u
g
g
es
tio
n
b
ased
o
n
s
u
g
g
e
s
ted
co
n
tacts
f
o
r
d
is
p
lay
to
th
e
u
s
er
.
W
h
er
ein
t
h
e
co
n
tact
s
u
g
g
est
io
n
i
n
clu
d
es
s
u
g
g
es
ted
co
n
tact
w
it
h
a
s
co
r
e
ab
o
v
e
d
ef
in
ed
t
h
r
esh
o
ld
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e.
g
.
,
s
y
s
te
m
s
en
d
s
a
li
s
t o
f
“
to
p
co
n
tacts”
t
o
th
e
u
s
er
)
.
Su
g
g
esting
Co
nta
ct
s
t
o
Re
mo
v
e
–
T
h
e
alg
o
r
ith
m
al
s
o
r
ep
lace
an
d
s
u
g
g
e
s
t
co
n
tacts
to
r
e
m
o
v
e
f
r
o
m
a
d
r
af
t
m
es
s
ag
e,
e
m
ai
l
o
r
co
m
m
u
n
ica
tio
n
–
b
y
s
u
g
g
est
in
g
r
e
m
o
v
al
o
f
a
f
ir
s
t
co
n
tact
a
n
d
ad
d
itio
n
o
f
a
s
ec
o
n
d
co
n
tac
t
th
at
is
s
i
m
ilar
to
th
e
f
ir
s
t
co
n
t
ac
t.
W
ith
th
e
R
e
m
o
v
e_
C
o
n
tac
t
alg
o
r
i
th
m
b
ased
o
n
u
s
er
’
s
e
g
o
ce
n
tr
ic
n
et
w
o
r
k
,
s
y
s
te
m
c
h
ec
k
s
to
k
n
o
w
an
d
e
n
s
u
r
e
i
f
t
h
e
r
e
m
o
v
al
an
ex
i
s
ti
n
g
r
ec
ip
ien
t
s
o
f
an
i
m
p
licit
g
r
o
u
p
,
cr
ea
tes
a
g
r
o
u
p
w
it
h
a
h
ig
h
er
s
co
r
e
th
a
n
th
e
o
n
e
f
o
r
m
ed
b
y
t
h
e
ex
is
ti
n
g
r
ec
ip
ien
t set.
Fu
n
c
t
i
o
n
Re
m
o
v
e
_
C
o
n
t
a
c
t
(
U
,
L
)
I
n
p
u
t
:
U
i
s
t
h
e
s
e
t
,
L
,
a
l
i
st
o
f
t
h
e
re
c
i
p
i
e
n
t
s
o
f
a
n
e
m
a
i
l
,
Re
t
u
r
n
s:
a
p
a
i
r {
c
,
s}
w
h
e
r
e
,
c
i
s
a
c
o
n
t
a
c
t
c
∈
L
S
i
s
a
s
u
g
g
e
s
t
e
d
c
o
n
t
a
c
t
t
o
re
p
l
a
c
e
S
c
o
re
m
a
x
←
0
Wro
n
g
Re
c
i
p
i
e
n
t
←
n
u
l
l
,
S
u
g
g
e
s
t
e
d
C
o
n
t
a
c
t
←
n
u
l
l
,
f
o
r e
a
c
h
c
o
n
t
a
c
t
G
∈
L;
S
e
e
d
←
L
\
Ci
resu
l
t
s
←
EX
PAN
D
S
E
ED
(
u
,
se
e
d
)
i
f
G
∈
res
u
l
t
s
c
o
n
t
i
n
u
e
f
o
r
e
a
c
h
c
o
n
t
a
c
t
g
∈
resu
l
t
s
i
f
I
S
S
I
MIL
AR(C
i
,
C
j
)
a
n
d
S
c
o
re
(
C
j
)
>
S
c
o
r
e
m
ax
S
c
o
re
m
a
x
←
S
c
o
r
e
(
C
j
)
Wro
n
g
Re
c
i
p
i
e
n
t
←
Ci
S
u
g
g
e
s
t
e
d
C
o
n
t
a
c
t
←
Cj
ret
u
rn
{W
ro
n
g
Re
c
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p
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e
n
t
,
s
u
g
g
e
st
e
d
C
o
n
t
a
c
t
}
I
n
itiall
y
,
t
h
e
s
y
s
te
m
s
e
ts
t
h
e
I
n
ter
ac
tio
n
s
R
a
n
k
(
i
f
a
n
y
)
f
o
r
th
e
cu
r
r
e
n
t
r
ec
ip
ien
t
s
o
f
a
n
e
m
ail
a
s
a
m
ax
i
m
u
m
s
co
r
e.
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t
th
en
,
f
o
r
ea
ch
c
o
n
tact
c
i
in
th
e
c
u
r
r
en
t
r
ec
ip
ien
t
lis
t
L
,
R
e
m
o
v
e
_
C
o
n
tact
b
u
ild
s
a
r
esp
ec
tiv
e
s
ee
d
-
s
et
th
a
t
in
cl
u
d
es
all
o
f
th
e
m
e
m
b
er
s
o
f
L
ex
ce
p
t
c
i
.
Fo
r
ea
ch
r
esp
ec
ti
v
e
s
ee
d
-
s
et,
s
y
s
te
m
d
eter
m
in
e
s
an
I
n
ter
ac
tio
n
s
R
a
n
k
(
i
f
an
y
)
f
o
r
th
e
s
ee
d
s
et.
An
d
,
if
I
n
ter
ac
tio
n
s
R
a
n
k
f
o
r
th
e
s
ee
d
s
et
is
g
r
ea
ter
th
an
t
h
e
cu
r
r
e
n
t
m
ax
i
m
u
m
s
c
o
r
e,
th
e
I
n
ter
ac
tio
n
s
R
an
k
o
f
th
e
s
ee
d
s
et
i
s
t
h
en
s
et
as
t
h
e
cu
r
r
en
t
m
a
x
i
m
u
m
s
co
r
e
–
s
o
th
at,
t
h
e
co
n
tact
c
t
h
at
w
a
s
r
e
m
o
v
ed
f
r
o
m
t
h
e
cu
r
r
en
t
r
ec
ip
ien
t
lis
t
L
is
s
et
a
s
t
h
e
W
r
o
n
g
R
ec
ip
ie
n
t.
T
h
u
s
,
th
e
s
y
s
te
m
d
eter
m
i
n
es
a
h
ig
h
e
s
t
I
n
ter
ac
tio
n
s
R
a
n
k
b
et
w
ee
n
t
h
e
I
R
o
f
th
e
cu
r
r
en
t
r
ec
ip
ien
ts
,
an
d
r
esp
ec
tiv
e
I
n
ter
ac
tio
n
s
R
a
n
k
s
f
o
r
ea
ch
p
o
s
s
ib
le
s
et
o
f
co
n
tac
ts
th
at
i
s
g
e
n
er
ated
b
y
r
e
m
o
v
i
n
g
a
s
i
n
g
le
co
n
tac
t
f
r
o
m
t
h
e
cu
r
r
en
t
r
ec
ip
ien
t
s
lis
t
L
.
Fu
r
t
h
er
m
o
r
e,
th
e
W
r
o
n
g
R
ec
ip
ien
t
lis
t
i
s
r
etu
r
n
ed
an
d
s
e
n
t
to
th
e
clie
n
t
as
a
s
u
g
g
e
s
tio
n
f
o
r
a
co
n
tact
to
r
em
o
v
e
f
r
o
m
t
h
e
co
m
m
u
n
icat
io
n
.
4.
RE
SU
L
T
,
D
I
SCU
SS
I
O
N
A
ND
F
I
NDI
NG
S
4
.
1
.
Su
m
m
a
ry
o
utput
T
ab
les
1
an
d
2
s
h
o
w
s
th
e
in
te
r
ac
tio
n
r
an
k
(
i.e
.
ed
g
e
w
ei
g
h
t
s
)
b
et
w
ee
n
t
h
e
u
s
er
an
d
i
ts
co
r
r
esp
o
n
d
in
g
co
n
tact
g
r
o
u
p
s
.
O
n
l
y
t
h
e
ed
g
e
w
e
ig
h
t
s
o
f
t
w
e
n
t
y
o
n
e
(
2
1
)
g
r
o
u
p
s
o
u
t
o
f
3
3
6
0
g
r
o
u
p
s
o
f
S
h
ac
k
leto
n
Sar
a
e
m
ail
w
as
d
o
cu
m
e
n
ted
.
T
ab
les
1
a
n
d
2
p
o
s
its
t
h
at
a
s
r
ec
e
n
c
y
w
ei
g
h
t
d
ec
a
y
v
al
u
es
r
ed
u
ce
s
lo
w
l
y
,
it
y
ield
s
an
in
cr
ea
s
e
i
n
t
h
e
i
m
p
o
r
ta
n
ce
o
f
i
n
ter
ac
tio
n
.
T
h
u
s
,
t
h
e
s
p
ee
d
d
ec
a
y
is
q
u
ite
s
lo
w
–
th
er
eb
y
,
g
i
v
en
th
e
i
n
ter
ac
tio
n
r
an
k
b
et
w
ee
n
t
h
e
u
s
er
an
d
th
e
g
r
o
u
p
m
u
c
h
ed
g
e
w
ei
g
h
t.
C
o
n
v
er
s
el
y
,
an
i
n
cr
ea
s
e
in
t
h
e
v
alu
e
o
f
th
e
r
ec
en
c
y
w
ei
g
h
t
d
ec
a
y
w
ill
r
ed
u
ce
t
h
e
r
esu
lt
v
al
u
es
s
i
n
ce
t
h
e
i
n
ter
ac
tio
n
i
m
p
o
r
ta
n
ce
is
v
er
y
f
ar
th
er
eb
y
t
h
e
s
p
ee
d
d
ec
ay
o
f
th
e
in
ter
ac
tio
n
i
m
p
o
r
tan
ce
w
ill
b
e
v
er
y
f
a
s
t;
W
h
i
le,
F
ig
u
r
e
3
s
h
o
w
s
th
e
u
s
er
c
o
n
tact
g
r
o
u
p
i
n
g
in
r
elatio
n
to
th
eir
tie
-
s
tr
e
n
g
h
t.
T
ab
le
1
.
T
h
e
f
ir
s
t iter
atio
n
o
f
t
h
e
in
ter
ac
t
io
n
r
an
k
(
co
n
tin
u
e
)
N
u
mb
e
r
It
e
ms
D
e
scri
p
t
i
o
n
1
D
u
r
a
t
i
o
n
2
4
4
.
4
4
4
4
5
1
5
7
0
5
1
0
8
6
se
c
o
n
d
s
2
D
a
t
a
se
t
S
i
z
e
8
1
9
8
4
b
y
t
e
s
3
N
o
.
o
f
G
r
o
u
p
s
3
3
6
0
4
U
se
r
C
o
n
t
a
c
t
s
4
0
3
1
5
S
e
e
d
S
e
t
'ch
r
i
s
.
f
o
st
e
r
@
e
n
r
o
n
.
c
o
m'
,
'a
n
n
a
.
j
a
n
sso
n
@
e
n
r
o
n
.
c
o
m'
Evaluation Warning : The document was created with Spire.PDF for Python.
I
SS
N
:
2
2
5
2
-
8938
I
n
t J
A
r
ti
f
I
n
tell
,
Vo
l.
9
,
No
.
3
,
Sep
te
m
b
er
20
20
:
4
9
7
–
50
6
504
T
ab
le
1
.
T
h
e
f
ir
s
t iter
atio
n
o
f
t
h
e
in
ter
ac
t
io
n
r
an
k
N
u
mb
e
r
It
e
ms
D
e
scri
p
t
i
o
n
6
T
o
p
1
0
su
g
g
e
st
e
d
c
o
n
t
a
c
t
s:
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l
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ssa.
mu
r
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c
o
m'
,
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't
r
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o
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o
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,
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RE
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[1
]
M
.
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M.
Ku
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.
,
M.
W
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.
,
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G
ro
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,
R.
W
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s:
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[7
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Sep
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20
20
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506
[9
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A
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Res
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o
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.
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3
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[1
2
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M.
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n
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,
I
mp
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Re
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w
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[1
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M.
G
ra
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o
v
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.,
Eco
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o
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o
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d
so
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ial
stru
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:
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p
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Ame
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4
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R.
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A
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A
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Qu
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K.
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.,
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D
re
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p
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0
8
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E.
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.,
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re
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ter
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[1
7
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rv
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h
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n
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(ECIR),
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).
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ro
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In
stit
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rn
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ie M
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n
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rsity
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p
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A.
[1
8
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-
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T
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g
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u
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lyz
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rc
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so
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d
a
t
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tra
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min
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A
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A
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o
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,
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a
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ters
in
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BN:
9
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telli
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p
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,
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g
r
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p
h
,
2
0
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re
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2
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w
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b
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tt
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h
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2
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R.
T
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e
n
,
R.
,
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v
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n
a
,
L
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,
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,
M
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,
On
n
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la,
J.K.,
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a
ra
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ä
k
ia,
J
.
,
K.
Ka
sk
ia.,
A
c
o
m
p
a
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a
ti
v
e
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o
f
s
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e
two
rk
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mo
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n
e
two
rk
e
v
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d
n
o
d
a
l
a
tt
rib
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,
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2
0
0
9
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3
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2
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0
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[2
3
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W
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V
a
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S
o
c
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n
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two
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t
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s
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0
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S.
W
a
ss
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r
m
a
n
.
,
K.
F
a
u
st
.
,
S
o
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Ne
two
rk
An
a
lys
is:
M
e
th
o
d
s
a
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d
A
p
p
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n
s
,
Ca
m
b
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P
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IS
BN 9
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G
.
M
ich
a
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lso
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,
T
h
e
d
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v
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e
n
t
o
f
a
sc
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ti
fi
c
sp
e
c
i
a
lt
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a
s
d
if
fu
sio
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th
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g
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s
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ti
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s:
T
h
e
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a
se
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f
ro
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a
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is
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c
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,
1
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1
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1
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3
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B
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RAP
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AUTH
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RS
A
rn
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ld
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d
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m
a
b
u
a
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re
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d
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c
in
Co
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p
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ter
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th
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2
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m
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tate
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A
b
a
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in
2
0
1
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.
He
c
u
rre
n
t
ly
lec
tu
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s
w
it
h
th
e
De
p
a
rtm
e
n
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o
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M
a
th
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m
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s/Co
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p
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ter
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th
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e
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Un
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it
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o
f
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tr
o
leu
m
Re
so
u
rc
e
s
E
ff
u
ru
n
,
De
lt
a
S
tate
,
Nig
e
ria.
His
re
se
a
rc
h
in
tere
sts:
In
telli
g
e
n
t
S
y
st
e
m
s
a
n
d
Co
n
tr
o
l,
Hig
h
P
e
rf
o
rm
a
n
c
e
a
n
d
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n
a
m
ic
Co
m
p
u
ti
n
g
,
M
a
c
h
in
e
-
L
e
a
rn
in
g
,
Co
m
p
u
ter
Visio
n
,
Ub
iq
u
it
o
u
s
Co
m
p
u
ti
n
g
,
Da
ta
S
e
c
u
rit
y
a
n
d
F
o
re
n
sic
s.
He
is
a
n
Ed
it
o
r
w
it
h
th
e
P
ro
g
re
ss
f
o
r
In
telli
g
e
n
t
Co
m
p
u
tatio
n
a
n
d
A
p
p
li
c
a
ti
o
n
,
A
d
v
a
n
c
e
m
e
n
t
f
o
r
S
c
ien
ti
f
ic
a
n
d
En
g
in
e
e
rin
g
Re
se
a
r
c
h
a
n
d
S
c
ien
c
e
P
G
(ACIS,
A
JN
C,
NET
a
n
d
W
CM
C
Jo
u
rn
a
ls).
He
is
a
m
e
m
b
e
r
o
f
:
T
h
e
Ni
g
e
rian
Co
m
p
u
ter
S
o
c
iety
,
Co
m
p
u
ter
P
r
o
f
e
ss
io
n
a
ls
o
f
Nig
e
ria
a
n
d
I
n
tern
a
ti
o
n
a
l
A
ss
o
c
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n
o
f
En
g
in
e
e
rs (IA
EN
G
).
De
b
b
y
Og
h
e
n
e
v
w
e
d
e
Ota
k
o
re
re
c
e
iv
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d
BS
c
a
n
d
M
S
c
i
n
C
o
m
p
u
ter S
c
ien
c
e
f
ro
m
Be
n
so
n
Id
a
h
o
sa
Un
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Ed
o
S
tate
a
n
d
T
h
e
Un
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e
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y
o
f
P
o
rt
-
Ha
rc
o
u
rt
i
n
2
0
0
8
a
n
d
2
0
1
5
re
sp
e
c
ti
v
e
ly
.
S
h
e
is
c
u
rre
n
tl
y
u
n
d
e
rg
o
in
g
h
e
r
Do
c
to
ra
l
S
tu
d
ies
in
th
e
sa
m
e
Co
m
p
u
ter
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c
ien
c
e
,
a
lso
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t
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h
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ff
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:
T
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Nig
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ter S
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.
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