pair,contact1,contact2,flow1,flow2 3swn_B_,1,5,1,1 3swn_B_,2,5,1,1 3swn_B_,2,6,1,1 3swn_B_,3,7,1,1 3swn_B_,4,8,1,1 3swn_B_,5,9,1,1 3swn_B_,7,10,1,1 3swn_B_,8,11,1,1 3swn_B_,10,13,1,1 3swn_B_,13,29,1,1 3swn_B_,14,71,1,1 3swn_B_,15,27,1,1 3swn_B_,16,69,1,1 3swn_B_,17,25,1,1 3swn_B_,18,66,1,1 3swn_B_,18,67,1,1 3swn_B_,19,22,1,1 3swn_B_,19,23,1,1 3swn_B_,24,46,1,1 3swn_B_,25,45,1,1 3swn_B_,26,44,1,1 3swn_B_,28,41,1,1 3swn_B_,30,31,1,1 3swn_B_,31,39,1,1 3swn_B_,33,36,1,1 3swn_B_,33,37,1,1 3swn_B_,36,62,1,1 3swn_B_,37,61,1,1 3swn_B_,38,60,1,1 3swn_B_,40,58,1,1 3swn_B_,41,43,1,1 3swn_B_,42,44,1,1 3swn_B_,43,55,1,1 3swn_B_,44,46,1,1 3swn_B_,44,51,1,1 3swn_B_,45,52,1,1 3swn_B_,45,53,1,1 3swn_B_,47,50,1,1 3swn_B_,53,54,1,1 3swn_B_,61,64,1,1 3swn_B_,62,65,1,1