pair,contact1,contact2,flow1,flow2
2xnd_I_,4,9,1,1
2xnd_I_,10,14,1,1
2xnd_I_,11,15,1,1
2xnd_I_,12,16,1,1
2xnd_I_,14,18,1,1
2xnd_I_,15,19,1,1
2xnd_I_,16,20,1,1
2xnd_I_,17,21,1,1
2xnd_I_,19,22,1,1
2xnd_I_,19,23,1,1
2xnd_I_,20,24,1,1
2xnd_I_,23,26,1,1
2xnd_I_,27,29,1,1
2xnd_I_,27,30,1,1
2xnd_I_,30,33,1,1
2xnd_I_,31,34,1,1
2xnd_I_,33,37,1,1
2xnd_I_,34,38,1,1
2xnd_I_,37,38,1,1