b
b
x1
b
a
b
a
a
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
2.2
b
b
a
b
x1
b
b
x1
b
b
x1
b
a
a
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
b
a
a
b
x1
b
b
x1
b
a
a
a
b
a
a
b
x1
b
b
x1
true
b
a
a
a
b
a
a
b
x1
b
b
x1
b
b
a
a
b
x1
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
x1
b
a
a
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
a
b
x1
b
b
x1
true
2
1
a
1
0
1
1
0
1
0
0
b
1
1
1
0
0
1
32465
0
b
1
1
0
0
0
1
0
0
b
b
a
b
x1
b
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
b
x1
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
a
a
a
b
a
a
b
x1
b
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
a
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
true
2
1
a
1
1
1
0
0
1
2
27877
b
1
1
27881
b
1
0
0
1
0
1
0
0
b
b
a
b
x1
b
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
b
a
b
x1
b
b
x1
true
2
1
a
1
0
0
1
0
1
29044
16403
b
1
0
1
0
1
1
107297
1
b
1
0
0
1
0
1
0
0
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
true
2
1
a
1
1
1
1
0
1
0
0
b
1
0
0
0
1
1
1
1
b
1
0
0
1
0
1
0
0
b
b
a
a
b
x1
b
a
a
b
b
x1
b
b
x1
b
a
b
a
a
b
x1
b
a
a
a
b
a
a
b
x1
b
a
a
a
b
b
x1
b
b
a
b
x1
b
a
b
b
x1
NaTT
certifiable-1.6