16 28
1 2 -0.375
2 3 -0.734375
1 4 0.3125
3 4 0.140625
1 5 -0.5703125
2 6 -0.921875
5 6 -0.859375
3 7 -0.1015625
6 7 -0.25
4 8 -0.046875
5 8 0.296875
7 8 0.1875
5 9 0.9375
6 10 -0.0078125
9 10 -0.2578125
7 11 -0.2265625
10 11 0.4921875
8 12 -0.21875
9 12 0.15625
11 12 0.0859375
9 13 -0.5625
10 14 -0.59375
13 14 -0.125
11 15 0.671875
14 15 -0.5390625
12 16 0.9296875
13 16 0.3515625
15 16 0.828125