f
g
a
f
s
g
b
f
f
x
b
g
x
f
g
x
2.2
g
x
g
x
f
g
a
f
s
g
b
g
x
f
g
x
f
g
a
g
b
true
f
g
a
g
b
g
x
f
g
x
g
x
g
x
true
a
0
3
s
1
1
0
b
0
1
f
1
21239
f
1
1
0
g
1
1
21240
g
1
1
21239
g
x
g
x
f
g
a
f
s
g
b
g
x
f
g
x
f
f
x
b
g
x
g
x
true
Failed!
NaTT
certifiable-1.6