16 28
1 2 -0.4140625
2 3 -0.046875
1 4 0.109375
3 4 -0.109375
1 5 0.59375
2 6 -0.21875
5 6 -0.703125
3 7 -0.0546875
6 7 -0.2734375
4 8 -0.984375
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7 8 -0.59375
5 9 -0.890625
6 10 -0.0234375
9 10 0.9296875
7 11 0.03125
10 11 0.5859375
8 12 -0.53125
9 12 0.703125
11 12 -0.0078125
9 13 0.6015625
10 14 -0.3828125
13 14 0.921875
11 15 0.1796875
14 15 0.8203125
12 16 0.390625
13 16 0.28125
15 16 -0.6015625