pair,contact1,contact2,flow1,flow2
4pdw_D_,1,2,1,1
4pdw_D_,8,11,1,1
4pdw_D_,9,12,1,1
4pdw_D_,18,20,1,1
4pdw_D_,22,24,1,1
4pdw_D_,23,26,1,1
4pdw_D_,23,27,1,1
4pdw_D_,24,28,1,1
4pdw_D_,31,32,1,1
4pdw_D_,35,38,1,1