a-a a-t a-z aaa aad aan aar aat aaz ad- ada add adn adr adt adz an- ana and ann anr ant anz ar- ara ard arn arr art arz at- ata atd atn atr att atz az- aza azd azn azt azz daa dad dan dar dat daz dda ddd ddn ddr ddt ddz dna dnd dnn dnr dnt dnz dra drd drn drr drt drz dta dtd dtn dtr dtt dtz dza dzd dzr naa nad nan nar nat naz nda ndd ndn ndr ndt nna nnn nnt nnz nra nrd nrn nrr nrt nrz nta ntd ntn ntr ntt ntz nzd nzz ra- raa rad ran rar rat raz rda rdd rdn rdr rdt rna rnd rnn rnr rnt rnz rra rrd rrn rrr rrt rta rtd rtn rtr rtt rtz rza taa tad tan tar tat taz tda tdd tdn tdr tdt tna tnd tnn tnr tnt tnz tra trd trn trr trt trz tta ttd ttn ttr ttt tza tzd zaa zad zan zar zat zaz zdt znd znn zta ztr zzr zzt zzz