16 28
1 2 -0.6640625
2 3 -0.3515625
1 4 0.0546875
3 4 0.0625
1 5 0.875
2 6 -0.890625
5 6 -0.015625
3 7 -0.125
6 7 -0.8671875
4 8 -0.0546875
5 8 -0.71875
7 8 0.140625
5 9 -0.1796875
6 10 0.453125
9 10 0.328125
7 11 -0.8828125
10 11 -0.4453125
8 12 -0.359375
9 12 -0.3046875
11 12 0.0859375
9 13 0.1796875
10 14 0.25
13 14 -0.7734375
11 15 0.5390625
14 15 -0.03125
12 16 0.3125
13 16 -0.71875
15 16 0.5