1 1
6
1 2
3 2
3 2
3 4
4 5
6 6
0 0 0 0
0 4 0 0
1 0 0 0
0 0 6 5
0 0 6 0
0 0 0 0
3
1 2 2 2 2 2
1 2 3 4 5 5
1 2 3 4 5 6