a
b
x1
d
x1
b
a
x1
a
b
x1
d
c
x1
f
a
b
b
c
x1
d
f
x1
f
a
b
x1
a
f
x1
a
x1
2.2
b
a
x1
b
x1
d
c
x1
b
c
x1
d
f
x1
b
x1
a
b
x1
d
x1
d
c
x1
b
b
c
x1
a
f
x1
a
x1
b
a
x1
a
b
x1
d
f
x1
a
b
x1
d
c
x1
a
b
b
c
x1
true
d
c
x1
a
b
b
c
x1
d
f
x1
a
b
x1
b
a
x1
a
b
x1
a
f
x1
a
x1
d
f
x1
b
x1
a
b
x1
d
x1
b
a
x1
b
x1
true
a
1
1
28102
d
1
1
28102
b
1
1
0
c
1
1
f
1
1
0
d
1
1
1
a
1
1
1
b
1
1
0
a
b
x1
d
x1
a
f
x1
a
x1
d
f
x1
a
b
x1
d
c
x1
a
b
b
c
x1
d
f
x1
f
a
b
x1
a
b
x1
d
x1
d
c
x1
f
a
b
b
c
x1
a
f
x1
a
x1
b
a
x1
a
b
x1
d
f
x1
a
b
x1
a
b
x1
d
x1
d
c
x1
a
b
b
c
x1
a
f
x1
a
x1
true
2
1
a
1
3100
1
d
1
3100
1
b
1
0
1
1
0
1
29509
1
c
1
1
1
1
1
1
30912
30914
f
1
1
0
0
d
1
0
0
1
0
1
29509
0
a
1
1
0
0
0
1
0
0
b
1
0
0
a
f
x1
a
x1
a
b
x1
d
x1
d
f
x1
a
b
x1
d
f
x1
f
a
b
x1
a
b
x1
d
x1
d
c
x1
f
a
b
b
c
x1
a
f
x1
a
x1
b
a
x1
a
b
x1
d
f
x1
a
b
x1
a
b
x1
d
x1
a
f
x1
a
x1
true
Failed!
NaTT
certifiable-1.6