32 32
0 0 1
1 1 -1
8 8 1
9 9 1
10 10 -1
11 11 1
12 12 -1
13 13 -1
18 18 1
19 19 1
20 20 -1
21 21 1
22 22 -1
23 23 -1
30 30 1
31 31 -1
