10
72 1 -1 -1 0
5 2 3 0 1
0 -1 -1 1 2
7 4 -1 0 1
12 5 8 3 2
11 6 -1 4 3
3 7 -1 5 4
3 -1 -1 6 5
6 9 -1 3 2
1 -1 -1 8 3
