pair,contact1,contact2,flow1,flow2
2ybb_I_,12,13,1,1
2ybb_I_,15,18,1,1
2ybb_I_,16,19,1,1
2ybb_I_,16,20,1,1
2ybb_I_,19,22,1,1
2ybb_I_,29,41,1,1
2ybb_I_,31,39,1,1