7
0 22 22 17 14 16 17 
22 0 10 9 10 8 7 
22 10 0 7 14 8 7 
17 9 7 0 11 5 4 
14 10 14 11 0 10 7 
16 8 8 5 10 0 3 
17 7 7 4 7 3 0