 12 10 5
1 0 0 0 0 0 0 0 1 1 1 1
 6 7 10
 4 6 9
 3 5 12
 4 7 12
 4 5 9
 1 7 8
 1 3 6
 3 8 11
 2 8 9
 4 7 9
