1	2	1	0.707107
1	2	4	0.707107
1	3	6	1
1	7	3	0.707107
2	4	2	1
2	4	5	0.707107
2	5	3	0.57735
3	5	0.0408248
3	5	2	0.57735
3	6	2	0.408248
4	5	1	0.707107
5	6	2	0.5