a
b
c
x1
c
b
a
x1
C
B
A
x1
A
B
C
x1
b
a
C
x1
C
a
b
x1
c
A
B
x1
B
A
c
x1
A
c
b
x1
b
c
A
x1
B
C
a
x1
a
C
B
x1
a
A
x1
x1
A
a
x1
x1
b
B
x1
x1
B
b
x1
x1
c
C
x1
x1
C
c
x1
x1
2.2
C
B
A
x1
B
C
x1
B
C
a
x1
B
x1
a
b
c
x1
c
b
a
x1
A
c
b
x1
A
x1
b
a
C
x1
a
b
x1
b
a
C
x1
b
x1
a
b
c
x1
b
a
x1
A
c
b
x1
b
c
A
x1
b
a
C
x1
C
a
b
x1
B
C
a
x1
C
B
x1
c
A
B
x1
A
c
x1
c
A
B
x1
B
A
c
x1
C
B
A
x1
C
x1
C
B
A
x1
A
B
C
x1
A
c
b
x1
c
A
x1
a
b
c
x1
a
x1
B
C
a
x1
a
C
B
x1
c
A
B
x1
c
x1
true
c
A
B
x1
c
x1
B
C
a
x1
a
C
B
x1
a
b
c
x1
b
a
x1
a
b
c
x1
a
x1
b
a
C
x1
b
x1
A
c
b
x1
c
A
x1
C
B
A
x1
A
B
C
x1
C
B
A
x1
C
x1
c
A
B
x1
B
A
c
x1
b
a
C
x1
a
b
x1
A
c
b
x1
A
x1
a
b
c
x1
c
b
a
x1
c
A
B
x1
A
c
x1
B
C
a
x1
B
x1
B
C
a
x1
C
B
x1
b
a
C
x1
C
a
b
x1
A
c
b
x1
b
c
A
x1
C
B
A
x1
B
C
x1
true
a
1
1
1
b
1
1
21239
B
1
1
8855
c
1
1
1
C
1
1
10803
B
1
1
8856
C
1
1
10802
A
1
1
44083
A
1
1
44082
c
1
1
0
a
1
1
0
b
1
1
21238
A
c
b
x1
b
c
A
x1
b
a
C
x1
C
a
b
x1
a
b
c
x1
c
b
a
x1
c
A
B
x1
B
A
c
x1
C
B
A
x1
A
B
C
x1
B
C
a
x1
a
C
B
x1
c
A
B
x1
B
A
c
x1
A
a
x1
x1
a
b
c
x1
c
b
a
x1
b
a
C
x1
C
a
b
x1
A
c
b
x1
b
c
A
x1
B
b
x1
x1
a
A
x1
x1
C
c
x1
x1
c
C
x1
x1
b
B
x1
x1
B
C
a
x1
a
C
B
x1
C
B
A
x1
A
B
C
x1
c
A
B
x1
B
A
c
x1
a
b
c
x1
c
b
a
x1
B
C
a
x1
a
C
B
x1
true
a
1
1
b
1
1
C
1
1
A
1
1
A
1
1
a
1
1
B
1
3
1
c
1
5
1
B
1
2
1
C
1
0
c
1
5
1
b
1
0
B
1
1
0
c
1
1
0
B
1
1
0
C
1
0
c
1
1
0
b
1
0
a
b
c
x1
c
b
a
x1
c
A
B
x1
B
A
c
x1
A
a
x1
x1
a
b
c
x1
c
b
a
x1
b
a
C
x1
C
a
b
x1
A
c
b
x1
b
c
A
x1
B
b
x1
x1
a
A
x1
x1
C
c
x1
x1
c
C
x1
x1
b
B
x1
x1
B
C
a
x1
a
C
B
x1
C
B
A
x1
A
B
C
x1
a
b
c
x1
c
b
a
x1
false
b
a
C
x1
C
a
b
x1
A
c
b
x1
b
c
A
x1
C
B
A
x1
A
B
C
x1
true
a
1
1
c
1
1
C
1
1
a
1
1
b
1
4
1
B
1
3
1
B
1
6
1
C
1
4
1
A
1
6
1
A
1
6
1
c
1
5
1
b
1
5
1
b
1
1
0
B
1
1
0
B
1
1
0
C
1
1
0
A
1
1
0
A
1
1
0
c
1
1
0
b
1
1
0
c
A
B
x1
B
A
c
x1
A
a
x1
x1
a
b
c
x1
c
b
a
x1
b
a
C
x1
C
a
b
x1
A
c
b
x1
b
c
A
x1
B
b
x1
x1
a
A
x1
x1
C
c
x1
x1
c
C
x1
x1
b
B
x1
x1
B
C
a
x1
a
C
B
x1
C
B
A
x1
A
B
C
x1
NaTT
certifiable-1.6