7
0 3 3 2 1 2 2 
3 0 0 1 2 1 1 
3 0 0 1 2 1 1 
2 1 1 0 1 41 41 
1 2 2 1 0 1 1 
2 1 1 41 1 0 41 
2 1 1 41 1 41 0