7 28
1 1 0.0
1 2 -1.8791812024316827
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 -1.1724802207396168
2 4 0.0
2 5 0.0
2 6 0.0
2 7 0.0
3 3 0.0
3 4 1.0532172142952747
3 5 0.0
3 6 0.0
3 7 0.0
4 4 0.0
4 5 -0.005843623908618946
4 6 0.0
4 7 0.0
5 5 0.0
5 6 0.25176305787287656
5 7 0.0
6 6 0.0
6 7 -0.720142882802827
7 7 0.0