pair,contact1,contact2,flow1,flow2 4y29_B_,2,5,1,1 4y29_B_,3,7,1,1 4y29_B_,4,8,1,1 4y29_B_,5,9,1,1 4y29_B_,6,9,1,1 4y29_B_,7,10,1,1