a
s
x1
s
a
x1
b
a
b
s
x1
a
b
s
a
x1
b
a
b
b
x1
a
b
a
b
x1
a
b
a
a
x1
b
a
b
a
x1
2.2
b
a
b
s
x1
b
s
a
x1
b
a
b
b
x1
a
b
x1
a
b
a
a
x1
a
b
a
x1
a
s
x1
a
x1
a
b
a
a
x1
b
a
x1
b
a
b
b
x1
b
a
b
x1
b
a
b
s
x1
a
x1
b
a
b
s
x1
a
b
s
a
x1
a
b
a
a
x1
b
a
b
a
x1
b
a
b
b
x1
a
b
a
b
x1
true
b
a
b
b
x1
a
b
a
b
x1
a
b
a
a
x1
b
a
b
a
x1
b
a
b
s
x1
a
x1
a
b
a
a
x1
a
b
a
x1
b
a
b
b
x1
a
b
x1
b
a
b
b
x1
b
a
b
x1
a
b
a
a
x1
b
a
x1
a
s
x1
a
x1
true
a
1
1
21239
s
1
1
7720
b
1
1
21239
a
1
1
0
b
1
1
0
a
b
a
a
x1
b
a
b
a
x1
b
a
b
b
x1
a
b
a
b
x1
a
b
a
a
x1
b
a
b
a
x1
a
s
x1
s
a
x1
b
a
b
b
x1
a
b
a
b
x1
b
a
b
s
x1
a
b
s
a
x1
a
b
a
a
x1
b
a
b
a
x1
b
a
b
b
x1
a
b
a
b
x1
true
2
1
a
1
0
0
1
1
1
1
29924
s
1
55
125
b
1
1
1
0
0
1
29924
59845
a
1
1
1
0
1
1
0
2
b
1
1
1
0
1
1
1
0
a
b
a
a
x1
b
a
b
a
x1
a
s
x1
s
a
x1
b
a
b
b
x1
a
b
a
b
x1
b
a
b
s
x1
a
b
s
a
x1
b
a
b
s
x1
a
b
s
a
x1
false
b
a
b
s
x1
b
s
a
x1
false
NaTT
certifiable-1.6