-er a-a a-c a-t a-z aaa aac aae aag aao aar aat aau aaz ac- aca acc ace acg aco acr act acu acz aea aec aee aeg aeo aer aet aeu aez ag- aga agc age agg ago agr agt agu agz aoa aoc aoe aog aoo aor aot aou ar- ara arc are arg aro arr art aru arz at- ata atc ate atg ato atr att atu atz au- aua auc aue aug auo aur aut auz az- aza aze azg azo azt azu azz c-- caa cac cae cag cao car cat cau caz cca ccc cce ccg cco ccr cct ccu ccz ce- cea cec cee ceg ceo cer cet ceu cez cga cgc cge cgg cgo cgr cgt cgu co- coa coc coe cog coo cor cot cou coz cra crc cre crg cro crr crt cru crz cta ctc cte ctg cto ctr ctt ctu ctz cua cuc cue cug cuo cur cut cuu cuz cz- czc cze czo czt eaa eac eae eag eao ear eat eau eaz ec- eca ecc ece ecg eco ecr ect ecu eea eec eee eeg eeo eer eet ega egc ege egg ego egr egt egu eo- eoa eoc eoe eog eoo eor eot eou era erc ere erg ero err ert eru erz eta etc ete etg eto etr ett etu etz eu- eua euc eue eug eur eut eze ezo ezr ezz gaa gac gae gag gao gar gat gau gaz gca gcc gce gcg gco gcr gct gcu ge- gea gec gee geg geo ger get geu gez gga ggc ggg ggo ggr ggt ggu ggz goa goc goe gog goo gor got gou goz gra grc gre grg gro grr grt gru gta gtc gte gtg gto gtr gtt gtu gu- gua guc gue gug guo gur gut guu guz gza gzo gzr gzu oaa oac oae oag oao oar oat oau oc- oca occ ocg oco ocr oct ocu ocz oea oec oee oeg oeo oer oet oga ogc oge ogg ogo ogt oo- ooa ooc oog ooo oor oot or- ora orc ore org oro orr ort oru orz ot- ota otc ote otg oto otr ott otu otz ou- oua ouc oue ouo our out oza oze ozo ozt ozu ozz ra- raa rac rae rag rao rar rat rau raz rca rcc rce rcg rco rcr rct rcu re- rea rec ree reg reo rer ret reu rez rga rgc rge rgg rgo rgr rgt roa roc roe rog roo ror rot rou roz rra rrc rrg rrr rrt rru rta rtc rte rtg rto rtr rtt rtu rtz rua ruc rue rug ruo rur rut ruu ruz rza rze rzo taa tac tae tag tao tar tat tau taz tca tcc tce tcg tco tcr tct tcu te- tea tec tee teg teo ter tet teu tez tga tgc tge tgg tgo tgr tgt tgu tgz to- toa toc toe tog too tor tot tou toz tra trc tre trg tro trr trt tru trz tta ttc tte ttg tto ttr ttt ttu tua tuc tue tug tuo tur tut tuu tuz tza tze tzu ua- uaa uac uae uag uao uar uat uau uaz uca ucc uce ucg uco ucr uct ucu uea uec uee ueg uer uet uga ugc uge ugg ugo ugr ugt ugu uoa uoc uoe uog uoo uor uot ur- ura urc ure urg uro urr urt uru urz uta utc ute uto utr utt utu utz uua uuc uue uug uur uut uuu uza uzo uzu z-g zaa zac zag zao zar zat zaz zce zco zea zec zee zeo zer zet zez zgg zo- zoa zoc zoe zog zoo zor zot zou zro zta zte ztr zuc zug zur zut zuz zzr zzt zzz