7 28
1 1 0.0
1 2 -0.4368506447990677
1 3 0.0
1 4 0.0
1 5 0.0
1 6 0.0
1 7 0.0
2 2 0.0
2 3 -0.46426701184647023
2 4 0.0
2 5 0.0
2 6 0.0
2 7 0.0
3 3 0.0
3 4 0.894845626518373
3 5 0.0
3 6 0.0
3 7 0.0
4 4 0.0
4 5 0.09725069864720458
4 6 0.0
4 7 0.0
5 5 0.0
5 6 -0.5477635195021647
5 7 0.0
6 6 0.0
6 7 1.8051584854836187
7 7 0.0