7
0 22 23 18 14 18 17 
22 0 11 10 12 8 9 
23 11 0 9 17 9 10 
18 10 9 0 14 6 7 
14 12 17 14 0 10 7 
18 8 9 6 10 0 3 
17 9 10 7 7 3 0