7
0 22 22 16 12 17 16 
22 0 10 8 12 7 8 
22 10 0 6 14 7 8 
16 8 6 0 10 3 4 
12 12 14 10 0 9 6 
17 7 7 3 9 0 3 
16 8 8 4 6 3 0