pair,contact1,contact2,flow1,flow2 1chc_A_,6,27,1,1 1chc_A_,14,16,1,1 1chc_A_,19,28,1,1 1chc_A_,20,54,1,1 1chc_A_,21,24,1,1 1chc_A_,21,26,1,1 1chc_A_,22,51,1,1 1chc_A_,22,52,1,1 1chc_A_,24,26,1,1 1chc_A_,26,43,1,1 1chc_A_,29,32,1,1 1chc_A_,33,37,1,1 1chc_A_,34,38,1,1 1chc_A_,36,39,1,1 1chc_A_,36,40,1,1 1chc_A_,43,48,1,1 1chc_A_,48,50,1,1 1chc_A_,65,68,1,1