a
b
c
a
x1
b
a
c
b
a
b
x1
a
d
x1
c
x1
a
f
f
x1
g
x1
b
g
x1
g
b
x1
c
x1
f
f
x1
c
a
c
x1
b
c
a
b
c
x1
c
d
x1
a
a
x1
g
x1
c
a
x1
g
x1
d
d
d
d
x1
2.2
c
a
c
x1
b
c
a
b
c
x1
c
d
x1
a
a
x1
a
b
c
a
x1
a
b
x1
a
b
c
a
x1
b
a
c
b
a
b
x1
a
b
c
a
x1
c
b
a
b
x1
a
b
c
a
x1
b
a
b
x1
a
b
c
a
x1
b
x1
c
d
x1
a
x1
a
b
c
a
x1
a
c
b
a
b
x1
c
a
c
x1
b
c
x1
b
g
x1
g
b
x1
g
x1
a
x1
c
a
c
x1
c
a
b
c
x1
a
d
x1
c
x1
a
f
f
x1
g
x1
g
x1
c
a
x1
c
a
c
x1
a
b
c
x1
b
g
x1
b
x1
true
b
g
x1
b
x1
c
a
c
x1
a
b
c
x1
a
b
c
a
x1
b
x1
g
x1
c
a
x1
a
b
c
a
x1
b
a
b
x1
a
f
f
x1
g
x1
a
d
x1
c
x1
c
a
c
x1
c
a
b
c
x1
g
x1
a
x1
a
b
c
a
x1
c
b
a
b
x1
a
b
c
a
x1
b
a
c
b
a
b
x1
a
b
c
a
x1
a
b
x1
b
g
x1
g
b
x1
c
d
x1
a
a
x1
c
a
c
x1
b
c
x1
a
b
c
a
x1
a
c
b
a
b
x1
c
d
x1
a
x1
c
a
c
x1
b
c
a
b
c
x1
true
a
1
1
13446
d
1
1
8964
b
1
1
0
c
1
1
22410
f
1
1
11205
g
1
1
35856
c
1
1
22410
a
1
1
17927
g
1
1
35856
b
1
1
0
c
a
c
x1
b
c
a
b
c
x1
a
b
c
a
x1
a
c
b
a
b
x1
b
g
x1
g
b
x1
c
a
c
x1
c
a
b
c
x1
g
x1
c
a
x1
b
g
x1
g
b
x1
g
x1
c
a
x1
a
b
c
a
x1
b
a
c
b
a
b
x1
a
f
f
x1
g
x1
c
x1
f
f
x1
c
d
x1
a
a
x1
g
x1
d
d
d
d
x1
c
a
c
x1
b
c
a
b
c
x1
a
d
x1
c
x1
a
b
c
a
x1
a
c
b
a
b
x1
true
Failed!
NaTT
certifiable-1.6