pair,contact1,contact2,flow1,flow2 6cas_U_,1,4,1,1 6cas_U_,1,7,1,1 6cas_U_,4,6,1,1 6cas_U_,4,7,1,1 6cas_U_,5,11,1,1 6cas_U_,7,10,1,1 6cas_U_,7,11,1,1 6cas_U_,8,11,1,1 6cas_U_,8,12,1,1 6cas_U_,9,13,1,1 6cas_U_,10,14,1,1 6cas_U_,11,15,1,1 6cas_U_,11,16,1,1 6cas_U_,16,21,1,1 6cas_U_,18,21,1,1