p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
2.2
p
a
x0
p
a
a
a
x1
x2
p
a
a
b
x0
x2
p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
true
p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
p
a
x0
p
a
a
a
x1
x2
p
a
a
b
x0
x2
true
a
1
1
b
1
1
p
2
2
0
p
2
2
21239
p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
true
a
1
0
1
b
1
0
p
2
1
2
p
2
1
2
1
a
1
1
0
b
1
0
p
2
2
0
0
p
2
1
0
2
0
0
p
a
x0
p
a
a
a
x1
x2
p
a
x2
p
a
a
b
x0
x2
NaTT
certifiable-1.6