32 32
3 3 1
5 5 -1
6 6 1
7 7 -1
8 8 1
9 9 -1
10 10 1
12 12 -1
19 19 1
21 21 -1
22 22 1
23 23 -1
24 24 1
25 25 -1
26 26 1
28 28 -1
