7 28
1 1 0.0
1 2 -1.2295556837238462
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 2.267588487931703
2 4 0.0
2 5 0.0
2 6 0.0
2 7 0.0
3 3 0.0
3 4 -0.002089632988107235
3 5 0.0
3 6 0.0
3 7 0.0
4 4 0.0
4 5 -1.5306205417453598
4 6 0.0
4 7 0.0
5 5 0.0
5 6 -0.20498852238629509
5 7 0.0
6 6 0.0
6 7 -0.6176739147140727
7 7 0.0