17 3
0 0 1 1
0 0 1 2
0 0 3 5
0 0 4 4
0 1 6 1
0 1 7 4
0 1 8 2
0 1 8 5
0 1 9 4
0 1 9 5
0 2 6 1
0 2 7 2
0 2 8 1
0 2 8 2
0 2 9 3
0 2 10 1
0 2 10 5
0 3 6 4
0 3 7 1
0 3 7 5
0 3 8 3
0 3 10 2
0 3 10 3
0 4 6 1
0 4 7 5
0 4 8 3
0 4 10 2
0 4 10 3
0 4 10 5
0 5 6 3
0 5 7 3
0 5 7 4
0 5 8 4
0 5 9 1
0 5 9 2
0 5 9 4
6 6 6 7
6 6 7 7
6 6 7 10
6 7 8 9
6 7 9 8
6 7 9 10
6 8 9 9
6 8 10 7
6 8 10 8
6 9 9 10
6 10 8 10
7 7 8 8
7 10 9 8
8 9 9 10
9 9 10 10