pair,contact1,contact2,flow1,flow2
1nd2_D_,1,15,1,1
1nd2_D_,3,13,1,1
1nd2_D_,3,27,1,1
1nd2_D_,5,11,1,1
1nd2_D_,8,10,1,1
1nd2_D_,19,22,1,1
1nd2_D_,20,23,1,1