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