30
6 2 13
13 3 6
10 0 4
1 0 5
29 0 0
10 7 11
6 0 8
19 0 9
25 10 0
13 0 0
25 12 0
29 0 0
17 14 24
24 15 17
28 16 0
21 0 0
13 18 19
22 0 0
9 20 23
20 21 22
11 0 0
20 0 0
18 0 0
26 25 29
0 0 26
28 0 27
18 0 28
18 0 0
29 0 30
2 0 0