pair,contact1,contact2,flow1,flow2 3vdd_D_,3,19,1,1 3vdd_D_,10,11,1,1 3vdd_D_,11,14,1,1 3vdd_D_,12,15,1,1 3vdd_D_,26,28,1,1 3vdd_D_,27,31,1,1