6			# of nodes in a given network
12			# of edges in a given network
1   5     9     	edge(1,5) with weight of 9
1   2     15		edge(2,3) with weight of 15
2   3     35			   .
2   4     3			   .
3   2     16			   .
3   4     6			   .
3   6     21			   .
4   5     2 			   .
4   6     7			   .
5   2     4			   .
5   4     2			   .
6   3     5		edge(6,3) with weight of 5