b
b
x1
b
a
x1
a
b
x1
b
c
c
x1
a
c
x1
a
a
x1
c
a
x1
b
a
a
x1
2.2
a
b
x1
c
c
x1
b
b
x1
b
a
x1
c
a
x1
a
a
x1
b
b
x1
a
x1
a
c
x1
a
x1
a
b
x1
c
x1
a
b
x1
b
c
c
x1
c
a
x1
b
a
a
x1
a
c
x1
a
a
x1
true
a
c
x1
a
a
x1
c
a
x1
b
a
a
x1
a
b
x1
b
c
c
x1
a
b
x1
c
x1
c
a
x1
a
a
x1
b
b
x1
b
a
x1
a
c
x1
a
x1
b
b
x1
a
x1
a
b
x1
c
c
x1
true
2
1
a
1
11104
11103
b
1
11104
1
c
1
0
0
1
0
1
1
11102
c
1
11104
5
a
1
11104
5
b
1
1
0
0
0
1
0
5
a
b
x1
c
c
x1
b
b
x1
a
x1
a
c
x1
a
x1
b
b
x1
b
a
x1
c
a
x1
a
a
x1
a
b
x1
c
x1
c
a
x1
b
a
a
x1
a
c
x1
a
a
x1
c
a
x1
b
a
a
x1
b
b
x1
b
a
x1
a
c
x1
a
a
x1
a
b
x1
b
c
c
x1
c
a
x1
a
a
x1
c
a
x1
b
a
a
x1
b
b
x1
a
x1
b
b
x1
b
a
x1
a
c
x1
a
x1
a
c
x1
a
a
x1
a
b
x1
c
x1
a
b
x1
c
c
x1
true
Failed!
NaTT
certifiable-1.6