pair,contact1,contact2,flow1,flow2
2rr1_4_,6,9,1,1
2rr1_4_,7,10,1,1
2rr1_4_,20,23,1,1
2rr1_4_,21,24,1,1
2rr1_4_,21,25,1,1
2rr1_4_,22,26,1,1
2rr1_4_,25,26,1,1
2rr1_4_,29,30,1,1
2rr1_4_,33,36,1,1