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