20
7 7 4746
1 2 4746
3 4 4746
7 9 4746
6 7 4746
2 7 4746
2 5 4746
1 10 4746
1 9 4746
4 7 4746
5 9 4746
1 1 4746
6 10 4746
1 10 4746
2 10 4746
2 5 4746
4 7 4746
2 7 4746
1 2 4746
5 9 4746
