pair,contact1,contact2,flow1,flow2 1nrl_C_,1,5,1,1 1nrl_C_,2,6,1,1 1nrl_C_,3,6,1,1 1nrl_C_,4,7,1,1 1nrl_C_,6,10,1,1 1nrl_C_,7,11,1,1 1nrl_C_,8,12,1,1 1nrl_C_,9,13,1,1 1nrl_C_,11,14,1,1