22
15
-2 2 3 4 0 -1 -1
-1 2 3 4 0 -1 -1
0 3 5 12 14 0 n n
1 1 3 0 s n
2 1 4 0 s n
3 1 7 0 s n
4 2 5 12 0 n n
5 1 10 0 n n
6 1 8 0 n n
7 1 9 0 n n
8 1 14 0 n n
9 1 15 0 n n
10 2 11 13 0 n n
11 1 11 0 n n
12 1 12 0 n n
13 1 12 0 n n
14 1 12 0 n n
15 1 2 0 n n
16 1 6 0 n n
17 1 1 0 n n
18 0 0 n n
19 0 0 n n