12
0 6 0.0
1 7 -0.5
2 4 -1.0
3 5 -1.5
4 2 -2.0
5 3 -2.5
6 0 -3.0
7 1 -3.5
8 14 -4.0
9 15 -4.5
10 12 -5.0
11 13 -5.5
0 6 0
1 7 1
2 4 2
3 5 3
4 2 4
5 3 5
6 0 6
7 1 7
12 10 12
13 11 13
14 8 14
15 9 15