16 28
1 2 -0.21875
2 3 0.8828125
1 4 0.3515625
3 4 -0.2421875
1 5 0.78125
2 6 -0.6171875
5 6 -0.6328125
3 7 -0.875
6 7 0.0625
4 8 -0.484375
5 8 -0.609375
7 8 -0.6015625
5 9 -0.8046875
6 10 0.9296875
9 10 -0.125
7 11 -0.1328125
10 11 0.890625
8 12 0.578125
9 12 -0.59375
11 12 -0.421875
9 13 0.0703125
10 14 -0.7890625
13 14 -0.8125
11 15 -0.8125
14 15 0.6328125
12 16 -0.4921875
13 16 0.515625
15 16 0.21875