a
a
b
b
x1
b
b
c
c
a
a
x1
b
b
c
c
x1
c
c
b
b
b
b
x1
b
b
a
a
x1
a
a
c
c
b
b
x1
2.2
b
b
c
c
x1
b
b
b
x1
b
b
a
a
x1
a
c
c
b
b
x1
a
a
b
b
x1
b
b
c
c
a
a
x1
a
a
b
b
x1
a
a
x1
a
a
b
b
x1
a
x1
b
b
a
a
x1
b
b
x1
a
a
b
b
x1
b
c
c
a
a
x1
b
b
a
a
x1
a
a
c
c
b
b
x1
b
b
c
c
x1
b
b
x1
b
b
c
c
x1
b
b
b
b
x1
b
b
a
a
x1
b
x1
b
b
c
c
x1
b
x1
true
a
a
b
b
x1
a
x1
a
a
b
b
x1
a
a
x1
true
a
1
1
1
b
1
1
30094
c
1
2
a
1
1
0
b
1
0
a
a
b
b
x1
b
b
c
c
a
a
x1
b
b
a
a
x1
a
a
c
c
b
b
x1
b
b
c
c
x1
c
c
b
b
b
b
x1
a
a
b
b
x1
b
b
c
c
a
a
x1
false
a
a
b
b
x1
b
c
c
a
a
x1
false
b
b
c
c
x1
b
x1
b
b
a
a
x1
b
x1
b
b
c
c
x1
b
b
b
b
x1
b
b
c
c
x1
b
b
x1
b
b
a
a
x1
b
b
x1
b
b
c
c
x1
b
b
b
x1
true
a
1
1
10451
b
1
1
0
c
1
1
0
a
1
1
0
b
1
1
0
b
b
c
c
x1
b
b
b
x1
b
b
c
c
x1
b
b
x1
b
b
c
c
x1
b
b
b
b
x1
b
b
c
c
x1
b
x1
a
a
b
b
x1
b
b
c
c
a
a
x1
b
b
a
a
x1
a
a
c
c
b
b
x1
b
b
c
c
x1
c
c
b
b
b
b
x1
b
b
c
c
x1
b
x1
b
b
c
c
x1
b
b
x1
b
b
c
c
x1
b
b
b
x1
b
b
c
c
x1
b
b
b
b
x1
true
2
1
a
1
1
1
0
0
1
21245
1
b
1
1
1
0
c
1
0
0
0
1
1
0
1
a
1
0
0
b
1
0
0
1
0
1
0
0
a
a
b
b
x1
b
b
c
c
a
a
x1
b
b
a
a
x1
a
a
c
c
b
b
x1
b
b
c
c
x1
c
c
b
b
b
b
x1
b
b
a
a
x1
a
a
c
c
b
b
x1
false
b
b
a
a
x1
a
c
c
b
b
x1
false
NaTT
certifiable-1.6