a
b
c
c
a
a
a
a
x1
a
a
a
a
a
b
c
c
a
a
b
c
c
x1
2.2
a
b
c
c
a
a
a
a
x1
a
a
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
a
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
b
c
c
a
a
b
c
c
x1
true
a
b
c
c
a
a
a
a
x1
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
a
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
a
a
b
c
c
a
a
b
c
c
x1
true
a
1
7720
b
1
7759
c
1
1
a
1
1
0
a
b
c
c
a
a
a
a
x1
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
a
a
a
a
b
c
c
a
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
x1
a
b
c
c
a
a
a
a
x1
a
b
c
c
a
a
b
c
c
x1
true
Failed!
NaTT
certifiable-1.6