a-a a-c a-t a-z aaa aac aan aao aar aat aaz ac- aca acc acn aco acr act acz an- ana anc ann ano anr ant anz aoa aoc aon aoo aor aot ar- ara arc arn aro arr art arz at- ata atc atn ato atr att atz az- aza azn azo azt azz c-- caa cac can cao car cat caz cca ccc ccn cco ccr cct ccz cn- cna cnc cnn cno cnr cnt co- coa coc con coo cor cot coz cra crc crn cro crr crt crz cta ctc ctn cto ctr ctt ctz cz- czc czo czt naa nac nan nao nar nat naz nca ncc ncn nco ncr nct nna nnc nnn nno nnt nnz no- noa noc non noo nor not noz nra nrc nrn nro nrr nrt nrz nta ntc ntn nto ntr ntt ntz nzo nzz oaa oac oan oao oar oat oc- oca occ ocn oco ocr oct ocz on- ona onc onn ono onr ont oo- ooa ooc oon ooo oor oot or- ora orc orn oro orr ort orz ot- ota otc otn oto otr ott otz oza ozo ozt ozz ra- raa rac ran rao rar rat raz rca rcc rcn rco rcr rct rna rnc rnn rno rnr rnt rnz roa roc ron roo ror rot roz rra rrc rrn rrr rrt rta rtc rtn rto rtr rtt rtz rza rzo taa tac tan tao tar tat taz tca tcc tcn tco tcr tct tna tnc tnn tno tnr tnt tnz to- toa toc ton too tor tot toz tra trc trn tro trr trt trz tta ttc ttn tto ttr ttt tza zaa zac zan zao zar zat zaz zco znc znn zno zo- zoa zoc zon zoo zor zot zro zta ztr zzr zzt zzz