10
2-2',2-2' 1 1
2-2,2-2 1 1
2-2,2-2 2 1
2-2;2-2 1 1
2-2;2-2 1 2
2-2;2-2 1 3
4-1 2 1
4-2' 1 1
4-2 1 1
4-2 2 1
