pair,contact1,contact2,flow1,flow2 8onk_D_,4,5,1,1 8onk_D_,5,9,1,1 8onk_D_,12,14,1,1 8onk_D_,13,16,1,1 8onk_D_,13,17,1,1 8onk_D_,16,19,1,1 8onk_D_,16,20,1,1 8onk_D_,17,20,1,1