a
a
b
x1
b
a
b
c
a
x1
b
a
x1
a
b
b
x1
b
c
a
x1
c
a
b
x1
2.2
b
a
x1
b
b
x1
a
a
b
x1
b
a
b
c
a
x1
a
a
b
x1
a
x1
a
a
b
x1
a
b
c
a
x1
b
c
a
x1
b
x1
b
a
x1
b
x1
b
a
x1
a
b
b
x1
a
a
b
x1
b
c
a
x1
b
c
a
x1
a
b
x1
true
b
c
a
x1
a
b
x1
a
a
b
x1
b
c
a
x1
b
a
x1
a
b
b
x1
b
a
x1
b
x1
a
a
b
x1
a
x1
a
a
b
x1
b
a
b
c
a
x1
b
c
a
x1
b
x1
a
a
b
x1
a
b
c
a
x1
b
a
x1
b
b
x1
true
a
1
1
11798
b
1
1
0
c
1
1
0
a
1
1
11798
b
1
1
0
a
a
b
x1
a
b
c
a
x1
a
a
b
x1
b
a
b
c
a
x1
b
a
x1
a
b
b
x1
b
c
a
x1
a
b
x1
a
a
b
x1
b
a
b
c
a
x1
b
c
a
x1
c
a
b
x1
b
a
x1
a
b
b
x1
a
a
b
x1
a
b
c
a
x1
a
a
b
x1
b
a
b
c
a
x1
b
c
a
x1
a
b
x1
b
a
x1
a
b
b
x1
true
a
1
26286
b
1
1
0
c
1
26287
a
1
26286
b
1
1
0
b
a
x1
a
b
b
x1
a
a
b
x1
b
a
b
c
a
x1
a
a
b
x1
a
b
c
a
x1
a
a
b
x1
b
a
b
c
a
x1
b
c
a
x1
c
a
b
x1
b
a
x1
a
b
b
x1
a
a
b
x1
a
b
c
a
x1
a
a
b
x1
b
a
b
c
a
x1
b
a
x1
a
b
b
x1
true
a
1
1
18460
b
1
1
0
c
1
18458
a
1
1
18459
b
1
1
0
a
a
b
x1
b
a
b
c
a
x1
b
c
a
x1
c
a
b
x1
b
a
x1
a
b
b
x1
NaTT
certifiable-1.6