a-a a-t aaa aad aar aat aay ad- ada add adr adt ady ar- ara ard arr art ary at- ata atd atr att ay- aya ayd ayr ayt daa dad dar dat day dda ddd ddr ddt ddy dra drd drr drt dry dta dtd dtr dtt dty dy- dya dyd dyr dyy ra- raa rad rar rat ray rda rdd rdr rdt rdy rra rrd rrr rrt rta rtd rtr rtt rty ry- rya ryd ryr ryy taa tad tar tat tay tda tdd tdr tdt tdy tra trd trr trt try tta ttd ttr ttt tty tya tyd tyr tyt yaa yad yar yat yay yda ydt ydy yra yrt yta ytd ytr ytt yyt yyy