pair,contact1,contact2,flow1,flow2 7brg_L_,1,3,1,1 7brg_L_,2,4,1,1 7brg_L_,2,5,1,1 7brg_L_,2,16,1,1 7brg_L_,4,20,1,1 7brg_L_,6,8,1,1 7brg_L_,6,15,1,1 7brg_L_,8,14,1,1 7brg_L_,10,12,1,1 7brg_L_,10,13,1,1 7brg_L_,17,20,1,1