pair,contact1,contact2,flow1,flow2
4aiy_A_,2,6,1,1
4aiy_A_,3,7,1,1
4aiy_A_,12,15,1,1
4aiy_A_,12,16,1,1
4aiy_A_,13,17,1,1
4aiy_A_,16,19,1,1
4aiy_A_,17,20,1,1