a
a
a
a
x1
b
b
c
c
x1
b
b
b
b
x1
a
a
c
c
x1
c
c
c
c
x1
b
a
a
a
x1
2.2
b
b
b
b
x1
a
c
c
x1
c
c
c
c
x1
a
a
a
x1
a
a
a
a
x1
b
b
c
c
x1
a
a
a
a
x1
c
c
x1
a
a
a
a
x1
c
x1
c
c
c
c
x1
a
a
x1
a
a
a
a
x1
b
c
c
x1
c
c
c
c
x1
b
a
a
a
x1
b
b
b
b
x1
c
c
x1
b
b
b
b
x1
a
a
c
c
x1
c
c
c
c
x1
a
x1
b
b
b
b
x1
c
x1
true
b
b
b
b
x1
c
x1
a
a
a
a
x1
c
x1
c
c
c
c
x1
a
x1
b
b
b
b
x1
a
a
c
c
x1
b
b
b
b
x1
c
c
x1
a
a
a
a
x1
c
c
x1
a
a
a
a
x1
b
b
c
c
x1
c
c
c
c
x1
a
a
a
x1
c
c
c
c
x1
b
a
a
a
x1
a
a
a
a
x1
b
c
c
x1
c
c
c
c
x1
a
a
x1
b
b
b
b
x1
a
c
c
x1
true
a
1
1
41063
b
1
1
41063
c
1
1
41063
c
1
1
82125
a
1
1
0
b
1
1
0
a
a
a
a
x1
b
b
c
c
x1
b
b
b
b
x1
a
a
c
c
x1
a
a
a
a
x1
b
b
c
c
x1
c
c
c
c
x1
b
a
a
a
x1
b
b
b
b
x1
a
a
c
c
x1
a
a
a
a
x1
b
b
c
c
x1
b
b
b
b
x1
a
a
c
c
x1
true
Failed!
NaTT
certifiable-1.6