16 28
1 2 0.59375
2 3 0.609375
1 4 -0.6015625
3 4 -0.453125
1 5 -0.0859375
2 6 -0.578125
5 6 0.2109375
3 7 -0.78125
6 7 -0.875
4 8 -0.6640625
5 8 -0.6640625
7 8 -0.265625
5 9 0.8359375
6 10 0.859375
9 10 -0.8515625
7 11 0.625
10 11 0.8671875
8 12 0.8359375
9 12 -0.71875
11 12 0.5390625
9 13 0.6328125
10 14 0.4921875
13 14 -0.265625
11 15 0.203125
14 15 0.0703125
12 16 0.015625
13 16 0.25
15 16 -0.0234375