a
l
x1
l
a
x1
a
c
x1
c
a
x1
c
a
r
x1
r
a
x1
l
r
a
x1
a
l
c
c
r
x1
2.2
a
c
x1
a
x1
l
r
a
x1
a
l
c
c
r
x1
l
r
a
x1
c
r
x1
l
r
a
x1
l
c
c
r
x1
a
l
x1
a
x1
c
a
r
x1
a
x1
a
c
x1
c
a
x1
l
r
a
x1
c
c
r
x1
a
l
x1
l
a
x1
true
a
l
x1
l
a
x1
a
c
x1
c
a
x1
c
a
r
x1
a
x1
l
r
a
x1
a
l
c
c
r
x1
a
l
x1
a
x1
a
c
x1
a
x1
true
a
1
1
0
r
1
1
2
l
1
1
1
c
1
1
0
c
1
1
0
l
1
1
2
a
1
1
1
a
c
x1
a
x1
l
r
a
x1
a
l
c
c
r
x1
a
l
x1
l
a
x1
l
r
a
x1
a
l
c
c
r
x1
a
l
x1
l
a
x1
c
a
r
x1
r
a
x1
a
c
x1
c
a
x1
a
c
x1
a
x1
true
a
1
1
0
r
1
1
l
1
1424
c
1
1
1
c
1
1
0
l
1
1
2
a
1
1
1
l
r
a
x1
a
l
c
c
r
x1
a
l
x1
l
a
x1
c
a
r
x1
r
a
x1
a
c
x1
c
a
x1
l
r
a
x1
a
l
c
c
r
x1
a
l
x1
l
a
x1
true
Failed!
NaTT
certifiable-1.6