-er a-a a-c a-t aaa aac aae aag aao aar aas aat aau ac- aca acc ace acg aco acr acs act acu aea aec aee aeg aeo aer aes aet aeu ag- aga agc age agg ago agr ags agt agu aoa aoc aoe aog aoo aor aos aot aou ar- ara arc are arg aro arr ars art aru as- asa asc ase asg aso asr ass ast asu at- ata atc ate atg ato atr ats att atu au- aua auc aue aug auo aur aus aut c-- caa cac cae cag cao car cas cat cau cca ccc cce ccg cco ccr ccs cct ccu ce- cea cec cee ceg ceo cer ces cet ceu cga cgc cge cgg cgo cgr cgs cgt cgu co- coa coc coe cog coo cor cos cot cou cra crc cre crg cro crr crs crt cru csa csc cse csg cso csr css cst csu cta ctc cte ctg cto ctr cts ctt ctu cua cuc cue cug cuo cur cus cut cuu eaa eac eae eag eao ear eas eat eau ec- eca ecc ece ecg eco ecr ecs ect ecu eea eec eee eeg eeo eer ees eet ega egc ege egg ego egr egs egt egu eo- eoa eoc eoe eog eoo eor eos eot eou era erc ere erg ero err ers ert eru es- esa esc ese esg eso esr ess est esu eta etc ete etg eto etr ets ett etu eu- eua euc eue eug eur eus eut gaa gac gae gag gao gar gas gat gau gca gcc gce gcg gco gcr gcs gct gcu ge- gea gec gee geg geo ger ges get geu gga ggc ggg ggo ggr ggs ggt ggu goa goc goe gog goo gor gos got gou gra grc gre grg gro grr grs grt gru gsa gsc gse gsg gso gsr gss gst gsu gta gtc gte gtg gto gtr gts gtt gtu gu- gua guc gue gug guo gur gus gut guu oaa oac oae oag oao oar oas oat oau oc- oca occ ocg oco ocr ocs oct ocu oea oec oee oeg oeo oer oes oet oga ogc oge ogg ogo ogs ogt oo- ooa ooc oog ooo oor oos oot or- ora orc ore org oro orr ors ort oru os- osa osc ose osg oso osr oss ost osu ot- ota otc ote otg oto otr ots ott otu ou- oua ouc oue ouo our ous out ra- raa rac rae rag rao rar ras rat rau rca rcc rce rcg rco rcr rcs rct rcu re- rea rec ree reg reo rer res ret reu rga rgc rge rgg rgo rgr rgs rgt roa roc roe rog roo ror ros rot rou rra rrc rrg rrr rrs rrt rru rsa rsc rse rsg rso rsr rss rst rsu rta rtc rte rtg rto rtr rts rtt rtu rua ruc rue rug ruo rur rus rut ruu saa sac sae sag sao sar sas sat sau sca scc sce scg sco scr scs sct scu se- sea sec see seg seo ser ses set seu sga sgc sge sgg sgo sgr sgs sgt sgu soa soc soe sog soo sor sos sot sou sr- sra src sre srg sro srr srs srt ss- ssa ssc sse ssg sso ssr sss sst ssu sta stc ste stg sto str sts stt stu sua suc sue sug suo sur sus sut suu taa tac tae tag tao tar tas tat tau tca tcc tce tcg tco tcr tcs tct tcu te- tea tec tee teg teo ter tes tet teu tga tgc tge tgg tgo tgr tgs tgt tgu to- toa toc toe tog too tor tos tot tou tra trc tre trg tro trr trs trt tru tsa tsc tse tsg tso tsr tss tst tsu tta ttc tte ttg tto ttr tts ttt ttu tua tuc tue tug tuo tur tus tut tuu ua- uaa uac uae uag uao uar uas uat uau uca ucc uce ucg uco ucr ucs uct ucu uea uec uee ueg uer ues uet uga ugc uge ugg ugo ugr ugs ugt ugu uoa uoc uoe uog uoo uor uos uot ur- ura urc ure urg uro urr urs urt uru usa usc use usg uso usr uss ust usu uta utc ute uto utr uts utt utu uua uuc uue uug uur uus uut uuu