a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
2.2
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
b
a
a
b
x1
true
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
true
2
1
a
1
0
1
1
0
1
0
0
b
1
0
0
1
1
1
48802
0
a
1
0
0
1
0
1
0
0
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
true
2
1
a
1
0
1
0
0
1
21422
1
b
1
0
0
0
1
1
21423
1
a
1
0
0
1
0
1
0
0
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
a
a
a
a
a
a
a
a
b
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
x1
a
a
b
a
a
a
a
a
a
a
a
x1
a
a
b
a
a
b
x1
true
Failed!
NaTT
certifiable-1.6