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