pair,contact1,contact2,flow1,flow2 4bpg_A_,2,6,1,1 4bpg_A_,3,7,1,1 4bpg_A_,4,8,1,1 4bpg_A_,5,9,1,1 4bpg_A_,6,10,1,1 4bpg_A_,7,11,1,1 4bpg_A_,8,12,1,1 4bpg_A_,9,13,1,1 4bpg_A_,10,14,1,1 4bpg_A_,11,15,1,1 4bpg_A_,12,17,1,1 4bpg_A_,13,16,1,1 4bpg_A_,13,48,1,1 4bpg_A_,15,33,1,1 4bpg_A_,17,19,1,1 4bpg_A_,18,21,1,1 4bpg_A_,18,22,1,1 4bpg_A_,19,23,1,1 4bpg_A_,23,26,1,1 4bpg_A_,24,67,1,1 4bpg_A_,27,31,1,1 4bpg_A_,27,64,1,1 4bpg_A_,28,33,1,1 4bpg_A_,28,64,1,1 4bpg_A_,29,32,1,1 4bpg_A_,35,37,1,1 4bpg_A_,35,38,1,1 4bpg_A_,36,40,1,1 4bpg_A_,37,41,1,1 4bpg_A_,38,42,1,1 4bpg_A_,39,43,1,1 4bpg_A_,40,44,1,1 4bpg_A_,41,45,1,1 4bpg_A_,42,46,1,1 4bpg_A_,43,47,1,1 4bpg_A_,44,48,1,1 4bpg_A_,45,49,1,1 4bpg_A_,46,50,1,1 4bpg_A_,49,77,1,1 4bpg_A_,54,57,1,1 4bpg_A_,54,58,1,1 4bpg_A_,55,58,1,1 4bpg_A_,59,61,1,1 4bpg_A_,59,62,1,1 4bpg_A_,59,63,1,1 4bpg_A_,64,68,1,1 4bpg_A_,65,68,1,1 4bpg_A_,65,69,1,1 4bpg_A_,66,70,1,1 4bpg_A_,67,71,1,1 4bpg_A_,68,72,1,1 4bpg_A_,69,73,1,1 4bpg_A_,70,74,1,1 4bpg_A_,71,75,1,1 4bpg_A_,72,76,1,1 4bpg_A_,73,77,1,1 4bpg_A_,75,78,1,1