7
0 26 26 22 16 21 21 
26 0 12 10 14 9 9 
26 12 0 8 16 9 9 
22 10 8 0 12 5 5 
16 14 16 12 0 11 7 
21 9 9 5 11 0 4 
21 9 9 5 7 4 0