7
0 9 11 8 9 8 10 
9 0 2 3 2 3 1 
11 2 0 3 2 3 1 
8 3 3 0 3 4 2 
9 2 2 3 0 3 1 
8 3 3 4 3 0 2 
10 1 1 2 1 2 0