pair,contact1,contact2,flow1,flow2
1na1_D_,6,9,1,1
1na1_D_,7,10,1,1
1na1_D_,20,22,1,1
1na1_D_,21,24,1,1
1na1_D_,21,25,1,1
1na1_D_,22,26,1,1
1na1_D_,29,30,1,1
1na1_D_,33,36,1,1