-er a-a a-c a-t aaa aac aae aag aar aas aat aau ac- aca acc ace acg acr acs act acu aea aec aee aeg aer aes aet aeu ag- aga agc age agg agr ags agt agu ar- ara arc are arg arr ars art aru as- asa asc ase asg asr ass ast asu at- ata atc ate atg atr ats att atu au- aua auc aue aug aur aus aut c-- caa cac cae cag car cas cat cau cca ccc cce ccg ccr ccs cct ccu ce- cea cec cee ceg cer ces cet ceu cga cgc cge cgg cgr cgs cgt cgu cra crc cre crg crr crs crt cru csa csc cse csg csr css cst csu cta ctc cte ctg ctr cts ctt ctu cua cuc cue cug cur cus cut cuu eaa eac eae eag ear eas eat eau ec- eca ecc ece ecg ecr ecs ect ecu eea eec eee eeg eer ees eet ega egc ege egg egr egs egt egu era erc ere erg err ers ert eru es- esa esc ese esg esr ess est esu eta etc ete etg etr ets ett etu eu- eua euc eue eug eur eus eut gaa gac gae gag gar gas gat gau gca gcc gce gcg gcr gcs gct gcu ge- gea gec gee geg ger ges get geu gga ggc ggg ggr ggs ggt ggu gra grc gre grg grr grs grt gru gsa gsc gse gsg gsr gss gst gsu gta gtc gte gtg gtr gts gtt gtu gu- gua guc gue gug gur gus gut guu ra- raa rac rae rag rar ras rat rau rca rcc rce rcg rcr rcs rct rcu re- rea rec ree reg rer res ret reu rga rgc rge rgg rgr rgs rgt rra rrc rrg rrr rrs rrt rru rsa rsc rse rsg rsr rss rst rsu rta rtc rte rtg rtr rts rtt rtu rua ruc rue rug rur rus rut ruu saa sac sae sag sar sas sat sau sca scc sce scg scr scs sct scu se- sea sec see seg ser ses set seu sga sgc sge sgg sgr sgs sgt sgu sr- sra src sre srg srr srs srt ss- ssa ssc sse ssg ssr sss sst ssu sta stc ste stg str sts stt stu sua suc sue sug sur sus sut suu taa tac tae tag tar tas tat tau tca tcc tce tcg tcr tcs tct tcu te- tea tec tee teg ter tes tet teu tga tgc tge tgg tgr tgs tgt tgu tra trc tre trg trr trs trt tru tsa tsc tse tsg tsr tss tst tsu tta ttc tte ttg ttr tts ttt ttu tua tuc tue tug tur tus tut tuu ua- uaa uac uae uag uar uas uat uau uca ucc uce ucg ucr ucs uct ucu uea uec uee ueg uer ues uet uga ugc uge ugg ugr ugs ugt ugu ur- ura urc ure urg urr urs urt uru usa usc use usg usr uss ust usu uta utc ute utr uts utt utu uua uuc uue uug uur uus uut uuu