c
c
c
a
x1
d
d
x1
d
b
x1
c
c
x1
c
x1
a
a
a
a
x1
d
x1
b
b
b
b
x1
b
d
x1
c
c
x1
a
c
c
c
x1
d
d
x1
2.2
d
b
x1
c
x1
b
d
x1
c
x1
d
x1
b
b
b
b
x1
c
x1
a
a
x1
c
c
c
a
x1
d
d
x1
c
c
c
a
x1
d
x1
d
x1
b
b
b
x1
c
x1
a
a
a
a
x1
c
x1
a
x1
b
d
x1
c
c
x1
d
x1
b
x1
a
c
c
c
x1
d
d
x1
d
b
x1
c
c
x1
c
x1
a
a
a
x1
d
x1
b
b
x1
a
c
c
c
x1
d
x1
true
a
c
c
c
x1
d
x1
d
x1
b
b
b
x1
d
x1
b
b
x1
c
c
c
a
x1
d
x1
c
x1
a
a
a
x1
d
b
x1
c
c
x1
a
c
c
c
x1
d
d
x1
d
x1
b
x1
c
c
c
a
x1
d
d
x1
c
x1
a
a
x1
d
x1
b
b
b
b
x1
b
d
x1
c
x1
b
d
x1
c
c
x1
c
x1
a
x1
c
x1
a
a
a
a
x1
d
b
x1
c
x1
true
a
1
1
13
d
1
1
85
b
1
1
21
c
1
1
53
d
1
1
73
c
1
1
40
a
1
1
0
b
1
1
9
d
x1
b
b
b
b
x1
c
c
c
a
x1
d
d
x1
c
x1
a
a
a
a
x1
b
d
x1
c
c
x1
a
c
c
c
x1
d
d
x1
d
b
x1
c
c
x1
NaTT
certifiable-1.6