7
0 25 25 22 13 19 19 
25 0 10 7 14 8 8 
25 10 0 7 16 10 10 
22 7 7 0 11 5 5 
13 14 16 11 0 10 6 
19 8 10 5 10 0 4 
19 8 10 5 6 4 0