15
5 10 2 23 0
23 1 15 13 0
8 11 7 14 0
10 6 7 16 0
15 23 9 0
6 27 25 16 0
13 11 8 23 0
11 10 5 6 0
30 24 27 8 0
26 20 2 9 0
6 22 3 0
9 6 14 5 0
29 18 14 22 0
8 28 11 9 0
22 28 17 0