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