r1
a
x1
a
a
a
r1
x1
r2
a
x1
a
a
a
r2
x1
a
l1
x1
l1
a
a
a
x1
a
a
l2
x1
l2
a
a
x1
r1
b
x1
l1
b
x1
r2
b
x1
l2
a
b
x1
b
l1
x1
b
r2
x1
b
l2
x1
b
r1
x1
a
a
x1
x1
2.2
r2
a
x1
a
a
r2
x1
b
l1
x1
b
r2
x1
r1
a
x1
a
r1
x1
a
l1
x1
a
a
x1
r1
a
x1
a
a
a
r1
x1
r1
a
x1
a
a
r1
x1
r1
a
x1
r1
x1
b
l1
x1
r2
x1
a
l1
x1
a
x1
r2
b
x1
a
b
x1
a
a
l2
x1
a
a
x1
b
l2
x1
r1
x1
r2
a
x1
a
r2
x1
r2
a
x1
a
a
a
r2
x1
a
l1
x1
a
a
a
x1
b
l2
x1
b
r1
x1
r2
a
x1
r2
x1
a
a
l2
x1
a
x1
true
b
l2
x1
b
r1
x1
b
l1
x1
b
r2
x1
true
2
1
a
1
0
1
1
0
1
0
0
b
1
0
0
1
1
1
6213
1
l1
1
0
1
1
0
1
6212
6212
l2
1
0
1
0
0
1
1
6213
r1
1
0
0
r1
1
0
1
1
0
1
6212
6212
r2
1
0
0
a
1
0
0
r2
1
0
1
1
0
1
1
1
b
1
0
0
1
0
1
0
0
a
a
l2
x1
l2
a
a
x1
b
l2
x1
b
r1
x1
r1
a
x1
a
a
a
r1
x1
a
l1
x1
l1
a
a
a
x1
r1
b
x1
l1
b
x1
b
l1
x1
b
r2
x1
a
a
x1
x1
r2
b
x1
l2
a
b
x1
r2
a
x1
a
a
a
r2
x1
b
l2
x1
r1
x1
false
r1
a
x1
r1
x1
true
a
1
1
1
b
1
1
1
l1
1
20166
l2
1
20163
r1
1
1
0
r1
1
1
20164
r2
1
0
a
1
0
r2
1
20167
b
1
0
r1
a
x1
a
a
a
r1
x1
false
r1
a
x1
a
a
r1
x1
false
r1
a
x1
a
r1
x1
false
b
l1
x1
r2
x1
false
r2
a
x1
r2
x1
true
a
1
1
1
b
1
1
1
l1
1
4
l2
1
1
r1
1
0
r1
1
1
2
r2
1
1
0
a
1
0
r2
1
20167
b
1
0
r2
a
x1
a
a
a
r2
x1
false
r2
a
x1
a
r2
x1
false
r2
b
x1
a
b
x1
false
r2
a
x1
a
a
r2
x1
false
a
a
l2
x1
a
x1
a
l1
x1
a
a
a
x1
a
l1
x1
a
a
x1
a
a
l2
x1
a
a
x1
a
l1
x1
a
x1
true
a
1
1
0
b
1
1
1143
l1
1
1
4
l2
1
1
1
r1
1
0
r1
1
1
3
r2
1
0
a
1
1
0
r2
1
1147
b
1
0
a
a
l2
x1
l2
a
a
x1
a
l1
x1
l1
a
a
a
x1
a
a
x1
x1
NaTT
certifiable-1.6