pair,contact1,contact2,flow1,flow2 1nhg_C_,1,2,1,1 1nhg_C_,1,9,1,1 1nhg_C_,2,5,1,1 1nhg_C_,2,6,1,1 1nhg_C_,3,7,1,1 1nhg_C_,4,8,1,1 1nhg_C_,5,9,1,1 1nhg_C_,6,10,1,1 1nhg_C_,7,11,1,1 1nhg_C_,8,12,1,1 1nhg_C_,9,13,1,1 1nhg_C_,10,13,1,1 1nhg_C_,10,14,1,1 1nhg_C_,11,15,1,1 1nhg_C_,13,18,1,1 1nhg_C_,17,19,1,1 1nhg_C_,17,50,1,1 1nhg_C_,22,25,1,1 1nhg_C_,23,27,1,1 1nhg_C_,24,28,1,1 1nhg_C_,25,28,1,1 1nhg_C_,26,30,1,1 1nhg_C_,27,31,1,1 1nhg_C_,28,32,1,1 1nhg_C_,29,33,1,1 1nhg_C_,30,34,1,1 1nhg_C_,32,35,1,1 1nhg_C_,32,38,1,1 1nhg_C_,33,38,1,1 1nhg_C_,35,37,1,1 1nhg_C_,35,38,1,1 1nhg_C_,36,39,1,1 1nhg_C_,38,41,1,1 1nhg_C_,42,44,1,1 1nhg_C_,49,51,1,1 1nhg_C_,49,52,1,1 1nhg_C_,49,53,1,1 1nhg_C_,51,54,1,1 1nhg_C_,52,55,1,1