pair,contact1,contact2,flow1,flow2 2qex_G_,1,6,1,1 2qex_G_,2,5,1,1 2qex_G_,2,6,1,1 2qex_G_,3,7,1,1 2qex_G_,4,8,1,1 2qex_G_,5,9,1,1 2qex_G_,6,10,1,1 2qex_G_,7,11,1,1 2qex_G_,8,12,1,1 2qex_G_,9,13,1,1 2qex_G_,10,14,1,1 2qex_G_,11,15,1,1 2qex_G_,12,16,1,1 2qex_G_,13,17,1,1 2qex_G_,14,18,1,1 2qex_G_,15,18,1,1 2qex_G_,19,22,1,1 2qex_G_,19,23,1,1 2qex_G_,20,23,1,1 2qex_G_,20,24,1,1 2qex_G_,21,25,1,1 2qex_G_,22,26,1,1 2qex_G_,23,27,1,1 2qex_G_,24,27,1,1 2qex_G_,24,28,1,1 2qex_G_,25,29,1,1