pair,contact1,contact2,flow1,flow2 3i56_U_,1,10,1,1 3i56_U_,3,8,1,1 3i56_U_,3,27,1,1 3i56_U_,4,27,1,1 3i56_U_,5,41,1,1 3i56_U_,5,51,1,1 3i56_U_,6,8,1,1 3i56_U_,6,51,1,1 3i56_U_,11,14,1,1 3i56_U_,16,28,1,1 3i56_U_,18,26,1,1 3i56_U_,20,24,1,1 3i56_U_,20,26,1,1 3i56_U_,22,24,1,1 3i56_U_,29,30,1,1 3i56_U_,31,35,1,1 3i56_U_,32,36,1,1 3i56_U_,33,37,1,1 3i56_U_,34,38,1,1 3i56_U_,36,41,1,1 3i56_U_,37,40,1,1 3i56_U_,42,45,1,1 3i56_U_,49,53,1,1