16 28
1 2 -0.1328125
2 3 -0.2421875
1 4 -0.9140625
3 4 0.9453125
1 5 -0.328125
2 6 -0.8671875
5 6 0.4609375
3 7 0.953125
6 7 0.8671875
4 8 0.546875
5 8 -0.6171875
7 8 -0.1484375
5 9 0.515625
6 10 0.96875
9 10 0.9140625
7 11 -0.5390625
10 11 -0.2578125
8 12 0.984375
9 12 0.734375
11 12 0.515625
9 13 -0.25
10 14 0.0390625
13 14 0.25
11 15 0.328125
14 15 0.5859375
12 16 -0.7578125
13 16 -0.609375
15 16 -0.2734375