0
x
2
d
6
8
b
0
6
5
c
e
8
3
c
0
7
1
1
c
0
2
9
a
4
a
b
7
8
6
1
1
0
e
8
f
9
6
4
7
1
6
0
x
2
d
6
8
b
0
6
5
c
e
8
3
c
0
7
1
1
c
0
2
9
a
4
a
b
7
8
6
1
1
0
e
8
f
9
6
4
7
1
6
