7
0 29 28 23 17 22 22 
29 0 11 10 14 9 9 
28 11 0 9 17 10 10 
23 10 9 0 14 7 7 
17 14 17 14 0 11 7 
22 9 10 7 11 0 4 
22 9 10 7 7 4 0