-er a-a a-c a-t aaa aac aae aag aan aar aas aat aau ac- aca acc ace acg acn acr acs act acu aea aec aee aeg aen aer aes aet aeu ag- aga agc age agg agn agr ags agt agu an- ana anc ane ang ann anr ans ant anu ar- ara arc are arg arn arr ars art aru as- asa asc ase asg asn asr ass ast asu at- ata atc ate atg atn atr ats att atu au- aua auc aue aug aun aur aus aut c-- caa cac cae cag can car cas cat cau cca ccc cce ccg ccn ccr ccs cct ccu ce- cea cec cee ceg cen cer ces cet ceu cga cgc cge cgg cgn cgr cgs cgt cgu cn- cna cnc cne cng cnn cnr cns cnt cnu cra crc cre crg crn crr crs crt cru csa csc cse csg csn csr css cst csu cta ctc cte ctg ctn ctr cts ctt ctu cua cuc cue cug cun cur cus cut cuu eaa eac eae eag ean ear eas eat eau ec- eca ecc ece ecg ecn ecr ecs ect ecu eea eec eee eeg een eer ees eet ega egc ege egg egn egr egs egt egu en- ena enc ene eng enn enr ens ent enu era erc ere erg ern err ers ert eru es- esa esc ese esg esn esr ess est esu eta etc ete etg etn etr ets ett etu eu- eua euc eue eug eun eur eus eut gaa gac gae gag gan gar gas gat gau gca gcc gce gcg gcn gcr gcs gct gcu ge- gea gec gee geg gen ger ges get geu gga ggc ggg ggn ggr ggs ggt ggu gna gnc gne gnn gnr gns gnt gnu gra grc gre grg grn grr grs grt gru gsa gsc gse gsg gsn gsr gss gst gsu gta gtc gte gtg gtn gtr gts gtt gtu gu- gua guc gue gug gun gur gus gut guu naa nac nae nag nan nar nas nat nau nca ncc nce ncg ncn ncr ncs nct ncu ne- nea nec nee neg nen ner nes net neu nga ngc nge ngg ngn ngs ngt ngu nna nnc nne nng nnn nns nnt nnu nra nrc nre nrg nrn nrr nrs nrt nru nsa nsc nse nsg nsn nsr nss nst nsu nta ntc nte ntg ntn ntr nts ntt ntu nua nuc nue nug nun nur nus nut nuu ra- raa rac rae rag ran rar ras rat rau rca rcc rce rcg rcn rcr rcs rct rcu re- rea rec ree reg ren rer res ret reu rga rgc rge rgg rgn rgr rgs rgt rna rnc rng rnn rnr rns rnt rnu rra rrc rrg rrn rrr rrs rrt rru rsa rsc rse rsg rsn rsr rss rst rsu rta rtc rte rtg rtn rtr rts rtt rtu rua ruc rue rug run rur rus rut ruu saa sac sae sag san sar sas sat sau sca scc sce scg scn scr scs sct scu se- sea sec see seg sen ser ses set seu sga sgc sge sgg sgn sgr sgs sgt sgu sna snc sne sng snn snr sns snt snu sr- sra src sre srg srn srr srs srt ss- ssa ssc sse ssg ssn ssr sss sst ssu sta stc ste stg stn str sts stt stu sua suc sue sug sun sur sus sut suu taa tac tae tag tan tar tas tat tau tca tcc tce tcg tcn tcr tcs tct tcu te- tea tec tee teg ten ter tes tet teu tga tgc tge tgg tgn tgr tgs tgt tgu tna tnc tne tng tnn tnr tns tnt tra trc tre trg trn trr trs trt tru tsa tsc tse tsg tsn tsr tss tst tsu tta ttc tte ttg ttn ttr tts ttt ttu tua tuc tue tug tun tur tus tut tuu ua- uaa uac uae uag uan uar uas uat uau uca ucc uce ucg ucn ucr ucs uct ucu uea uec uee ueg uen uer ues uet uga ugc uge ugg ugn ugr ugs ugt ugu un- una unc une ung unn unr uns unt unu ur- ura urc ure urg urn urr urs urt uru usa usc use usg usn usr uss ust usu uta utc ute utn utr uts utt utu uua uuc uue uug uun uur uus uut uuu