10
0 1 2 | 0 1 2
0 1 3 | 0 1 2
0 1 4 | 0 1 2
0 2 3 | 0 1 2
0 2 4 | 0 1 2
0 3 4 | 0 1 2
1 2 3 | 0 1 2
1 2 4 | 0 1 2
1 3 4 | 0 1 2
2 3 4 | 0 1 2