7 28
1 1 0.0
1 2 -2.4941484483884486
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 -1.0403255473442714
2 4 0.0
2 5 0.0
2 6 0.0
2 7 0.0
3 3 0.0
3 4 -0.5982603825182269
3 5 0.0
3 6 0.0
3 7 0.0
4 4 0.0
4 5 0.2539756489952755
4 6 0.0
4 7 0.0
5 5 0.0
5 6 -0.7462789311633581
5 7 0.0
6 6 0.0
6 7 -0.9838350451677593
7 7 0.0