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