15 3
0 0 1 4
0 0 2 2
0 0 2 4
0 0 3 2
0 1 7 3
0 1 7 5
0 1 8 5
0 1 9 1
0 1 9 3
0 1 10 3
0 2 6 5
0 2 7 5
0 2 9 2
0 2 9 3
0 2 10 1
0 3 6 1
0 3 6 3
0 3 7 4
0 3 8 4
0 3 10 2
0 4 6 2
0 4 6 5
0 4 8 1
0 4 8 3
0 4 8 4
0 4 10 1
0 5 6 2
0 5 7 1
0 5 8 1
0 5 8 4
0 5 10 2
0 5 10 5
6 6 6 7
6 8 7 10
6 9 7 9
6 9 9 10
6 9 10 7
6 9 10 9
6 10 8 9
6 10 9 9
7 7 7 10
7 8 7 10
7 8 8 9
7 8 8 10
8 8 10 9