1
20
0 1 0 0 0 0 0 0 0 0 0 0 11 0 0 0 18 0 0 0
12 11
6 17
18 7
8 3
14 20
3 6
5 1
4 16
11 14
2 9
16 12
20 15
13 5
1 19
19 8
10 13
17 18
9 4
15 10
