pair,contact1,contact2,flow1,flow2 4qil_C_,3,17,1,1 4qil_C_,4,16,1,1 4qil_C_,5,15,1,1 4qil_C_,6,14,1,1 4qil_C_,7,13,1,1 4qil_C_,8,12,1,1