6 8  5 3  5 2  6 4
5 6  0 0

8 1  7 3  6 2  8 9  7 5
7 4  7 8  7 6  0 0

3 8  6 8  6 4
5 3  5 6  5 2  0 0

0 0

1 2
1 3
0 0

1 2
1 3
1 4
2 5
2 6
2 7
3 8
3 9
3 10
4 11
4 12
4 13
0 0

1 2
0 0

1 2
1 3
4 5
0 0

1 1
0 0

1 2
2 1
0 0

1 2
1 2
0 0

1 2
1 3
2 4
2 5
2 6
2 7
3 8
8 9
9 10
10 11
11 12
12 13
0 0

-1 -1