16 3
0 0 1 2
0 0 2 2
0 0 2 4
0 0 4 4
0 1 6 2
0 1 6 3
0 1 7 3
0 1 7 4
0 1 8 1
0 1 9 4
0 2 8 2
0 2 8 4
0 2 8 5
0 2 9 3
0 2 10 1
0 3 6 4
0 3 7 1
0 3 8 2
0 3 8 3
0 3 9 5
0 3 10 1
0 3 10 5
0 4 6 3
0 4 7 4
0 4 7 5
0 4 8 2
0 4 9 3
0 4 10 2
0 5 6 5
0 5 7 1
0 5 8 1
0 5 8 5
0 5 9 3
0 5 10 1
6 6 7 7
6 7 9 9
6 7 10 7
6 8 7 9
6 8 10 7
6 9 6 10
6 9 7 8
6 9 9 10
6 10 7 8
6 10 8 10
6 10 9 9
7 8 8 9
7 10 8 10
7 10 9 8