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