20
1 1 1
2 2 1
4 3 0
2 1 1
4 4 0
4 3 1
3 1 1
4 2 1
4 4 1
1 1 0
3 2 1
4 1 0
3 1 0
3 2 0
2 2 0
3 3 0
4 2 0
4 1 1
2 1 0
3 3 1
