7
0 25 23 19 16 20 19 
25 0 12 12 13 9 10 
23 12 0 8 15 7 8 
19 12 8 0 13 5 6 
16 13 15 13 0 10 7 
20 9 7 5 10 0 3 
19 10 8 6 7 3 0