pair,contact1,contact2,flow1,flow2
2n21_A_,8,11,1,1
2n21_A_,9,12,1,1
2n21_A_,10,14,1,1
2n21_A_,12,15,1,1
2n21_A_,12,16,1,1
2n21_A_,18,20,1,1