a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
b
a
b
a
c
a
b
a
c
x1
2.2
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
b
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
a
b
a
c
x1
true
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
b
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
b
a
c
a
b
a
c
x1
true
2
1
a
1
0
0
1
0
1
0
29905
b
1
1
1
7379
c
1
1
37285
a
1
1
0
1
0
1
0
0
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
b
a
b
a
b
a
c
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
x1
a
b
a
c
a
b
a
b
a
b
x1
a
b
a
c
a
b
a
c
x1
true
Failed!
NaTT
certifiable-1.6