a
a
b
d
b
d
a
x1
a
a
c
a
a
b
d
x1
a
a
c
x1
c
c
a
a
x1
c
c
c
x1
b
d
c
b
d
x1
2.2
a
a
c
x1
c
a
a
x1
a
a
b
d
b
d
a
x1
a
a
c
a
a
b
d
x1
a
a
b
d
b
d
a
x1
a
a
b
d
x1
a
a
b
d
b
d
a
x1
a
c
a
a
b
d
x1
a
a
b
d
b
d
a
x1
a
b
d
x1
c
c
c
x1
c
b
d
x1
a
a
c
x1
a
a
x1
a
a
c
x1
c
c
a
a
x1
a
a
b
d
b
d
a
x1
c
a
a
b
d
x1
a
a
c
x1
a
x1
true
a
a
c
x1
a
x1
a
a
c
x1
a
a
x1
a
a
b
d
b
d
a
x1
a
a
b
d
x1
a
a
b
d
b
d
a
x1
a
a
c
a
a
b
d
x1
a
a
b
d
b
d
a
x1
a
c
a
a
b
d
x1
true
2
1
a
1
1
0
1
d
1
0
0
1
1
1
1
0
b
1
0
0
1
1
1
0
0
c
1
1
0
0
0
1
0
0
c
1
0
0
a
1
1
1
0
0
1
0
0
a
a
c
x1
a
a
x1
a
a
c
x1
a
x1
a
a
b
d
b
d
a
x1
a
a
c
a
a
b
d
x1
c
c
c
x1
b
d
c
b
d
x1
a
a
c
x1
c
c
a
a
x1
a
a
c
x1
a
x1
a
a
c
x1
a
a
x1
true
2
1
a
1
1
40492
20367
d
1
1
1
0
0
1
0
0
b
1
0
1
1
1
1
0
0
c
1
0
0
0
1
1
0
0
c
1
0
0
a
1
0
0
1
0
1
0
0
a
a
c
x1
a
a
x1
a
a
b
d
b
d
a
x1
a
a
c
a
a
b
d
x1
c
c
c
x1
b
d
c
b
d
x1
a
a
c
x1
c
c
a
a
x1
a
a
c
x1
a
a
x1
true
Failed!
NaTT
certifiable-1.6