c
b
a
a
x1
a
a
b
c
x1
b
a
a
a
x1
a
a
a
b
x1
a
b
c
x1
c
b
a
x1
c
c
b
b
x1
b
b
c
c
x1
2.2
b
a
a
a
x1
a
a
b
x1
a
b
c
x1
b
a
x1
c
c
b
b
x1
b
c
c
x1
c
b
a
a
x1
a
b
c
x1
c
b
a
a
x1
c
x1
c
c
b
b
x1
b
b
c
c
x1
c
c
b
b
x1
c
c
x1
a
b
c
x1
a
x1
c
b
a
a
x1
b
c
x1
a
b
c
x1
c
b
a
x1
b
a
a
a
x1
a
b
x1
b
a
a
a
x1
a
a
a
b
x1
c
b
a
a
x1
a
a
b
c
x1
c
c
b
b
x1
c
x1
b
a
a
a
x1
b
x1
true
b
a
a
a
x1
b
x1
c
c
b
b
x1
c
c
x1
c
c
b
b
x1
c
x1
c
c
b
b
x1
b
b
c
c
x1
c
b
a
a
x1
a
a
b
c
x1
b
a
a
a
x1
a
a
a
b
x1
b
a
a
a
x1
a
b
x1
c
b
a
a
x1
c
x1
c
b
a
a
x1
a
b
c
x1
c
c
b
b
x1
b
c
c
x1
a
b
c
x1
b
a
x1
a
b
c
x1
c
b
a
x1
c
b
a
a
x1
b
c
x1
a
b
c
x1
a
x1
b
a
a
a
x1
a
a
b
x1
true
a
1
1
5854
b
1
1
4685
c
1
1
30613
c
1
1
25928
a
1
1
1169
b
1
1
0
a
b
c
x1
c
b
a
x1
b
a
a
a
x1
a
a
a
b
x1
c
b
a
a
x1
a
a
b
c
x1
c
c
b
b
x1
b
b
c
c
x1
c
c
b
b
x1
b
b
c
c
x1
c
b
a
a
x1
a
a
b
c
x1
a
b
c
x1
c
b
a
x1
b
a
a
a
x1
a
a
a
b
x1
c
c
b
b
x1
b
b
c
c
x1
c
b
a
a
x1
a
a
b
c
x1
a
b
c
x1
c
b
a
x1
b
a
a
a
x1
a
a
a
b
x1
true
2
1
a
1
0
0
1
0
1
0
0
b
1
0
1
0
0
1
0
0
c
1
1
0
0
0
1
31302
0
c
1
1
0
0
0
1
1
0
a
1
0
0
1
0
1
0
0
b
1
1
0
c
c
b
b
x1
b
b
c
c
x1
c
b
a
a
x1
a
a
b
c
x1
a
b
c
x1
c
b
a
x1
b
a
a
a
x1
a
a
a
b
x1
NaTT
certifiable-1.6