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