pair,contact1,contact2,flow1,flow2 4nm0_B_,4,8,1,1 4nm0_B_,5,9,1,1 4nm0_B_,6,10,1,1 4nm0_B_,7,11,1,1 4nm0_B_,8,12,1,1 4nm0_B_,9,13,1,1 4nm0_B_,10,14,1,1 4nm0_B_,11,15,1,1 4nm0_B_,12,16,1,1 4nm0_B_,13,17,1,1 4nm0_B_,15,18,1,1 4nm0_B_,15,19,1,1