pair,contact1,contact2,flow1,flow2
2a1d_A_,17,20,1,1
2a1d_A_,17,21,1,1
2a1d_A_,17,27,1,1
2a1d_A_,20,25,1,1
2a1d_A_,21,23,1,1
2a1d_A_,21,24,1,1