pair,contact1,contact2,flow1,flow2 2xn3_B_,11,29,1,1 2xn3_B_,13,27,1,1 2xn3_B_,15,24,1,1 2xn3_B_,15,25,1,1 2xn3_B_,17,19,1,1 2xn3_B_,17,20,1,1 2xn3_B_,17,22,1,1 2xn3_B_,18,21,1,1 2xn3_B_,20,22,1,1 2xn3_B_,31,33,1,1 2xn3_B_,31,34,1,1