16 28
1 2 -0.8203125
2 3 0.859375
1 4 -0.0859375
3 4 -0.2109375
1 5 0.84375
2 6 0.6953125
5 6 0.203125
3 7 0.1015625
6 7 -0.6875
4 8 -0.1796875
5 8 0.0078125
7 8 -0.9296875
5 9 0.5625
6 10 -0.953125
9 10 -0.84375
7 11 0.8046875
10 11 0.2578125
8 12 -0.8359375
9 12 -0.6796875
11 12 -0.9375
9 13 -0.2265625
10 14 -0.0859375
13 14 0.0390625
11 15 -0.6328125
14 15 -0.609375
12 16 0.484375
13 16 0.6640625
15 16 -0.0859375