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

7
7
2

0 0
1 0
3 1
4 0
5 0
6 0
7 0

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