16 28
1 2 -0.2734375
2 3 -0.046875
1 4 0.5625
3 4 0.765625
1 5 0.734375
2 6 0.8671875
5 6 0.0859375
3 7 -0.921875
6 7 0.6796875
4 8 0.7734375
5 8 0.078125
7 8 0.3984375
5 9 -0.3203125
6 10 0.15625
9 10 0.8515625
7 11 0.4140625
10 11 -0.3125
8 12 0.5859375
9 12 -0.59375
11 12 0.125
9 13 -0.25
10 14 0.5234375
13 14 -0.8125
11 15 -0.4453125
14 15 -0.6328125
12 16 0.1796875
13 16 -0.578125
15 16 0.3125