d
a
x1
b
d
x1
b
x1
a
a
a
x1
c
d
c
x1
a
d
x1
b
d
d
x1
c
c
d
d
c
x1
2.2
d
a
x1
b
d
x1
b
d
d
x1
d
d
c
x1
b
d
d
x1
d
c
x1
b
d
d
x1
c
d
d
c
x1
d
a
x1
d
x1
c
d
c
x1
d
x1
b
d
d
x1
c
x1
b
d
d
x1
c
c
d
d
c
x1
true
b
d
d
x1
c
c
d
d
c
x1
b
d
d
x1
c
x1
c
d
c
x1
d
x1
d
a
x1
d
x1
b
d
d
x1
d
d
c
x1
b
d
d
x1
c
d
d
c
x1
b
d
d
x1
d
c
x1
d
a
x1
b
d
x1
true
a
1
1
0
d
1
1
11798
b
1
1
0
c
1
1
0
d
1
1
11798
c
1
1
0
b
1
1
0
d
a
x1
b
d
x1
b
d
d
x1
c
d
d
c
x1
b
d
d
x1
d
d
c
x1
d
a
x1
d
x1
c
d
c
x1
d
x1
b
d
d
x1
c
c
d
d
c
x1
b
d
d
x1
c
c
d
d
c
x1
d
a
x1
b
d
x1
c
d
c
x1
a
d
x1
b
x1
a
a
a
x1
b
d
d
x1
d
d
c
x1
b
d
d
x1
c
d
d
c
x1
b
d
d
x1
c
c
d
d
c
x1
d
a
x1
d
x1
d
a
x1
b
d
x1
c
d
c
x1
d
x1
true
a
1
1
d
1
14682
b
1
1
c
1
1
d
1
14682
c
1
1
0
b
1
14682
c
d
c
x1
d
x1
d
a
x1
b
d
x1
d
a
x1
d
x1
b
d
d
x1
c
d
d
c
x1
b
d
d
x1
d
d
c
x1
b
d
d
x1
c
c
d
d
c
x1
d
a
x1
b
d
x1
c
d
c
x1
a
d
x1
b
x1
a
a
a
x1
b
d
d
x1
d
d
c
x1
b
d
d
x1
c
d
d
c
x1
d
a
x1
d
x1
d
a
x1
b
d
x1
c
d
c
x1
d
x1
true
Failed!
NaTT
certifiable-1.6