1

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