-er -th a-a a-c a-t aaa aac aae aag aah aar aas aat ac- aca acc ace acg ach acr acs act aea aec aee aeg aeh aer aes aet ag- aga agc age agg agh agr ags agt aha ahc ahe ahg ahh ahr ahs aht ar- ara arc are arg arh arr ars art as- asa asc ase asg ash asr ass ast at- ata atc ate atg ath atr ats att c-- caa cac cae cag cah car cas cat cca ccc cce ccg cch ccr ccs cct ce- cea cec cee ceg ceh cer ces cet cga cgc cge cgg cgh cgr cgs cgt ch- cha chc che chg chh chr chs cht cra crc cre crg crh crr crs crt csa csc cse csg csh csr css cst cta ctc cte ctg cth ctr cts ctt eaa eac eae eag eah ear eas eat ec- eca ecc ece ecg ech ecr ecs ect eea eec eee eeg eer ees eet ega egc ege egg egh egr egs egt eha ehc ehe ehg ehh ehr ehs eht era erc ere erg erh err ers ert es- esa esc ese esg esh esr ess est eta etc ete etg eth etr ets ett gaa gac gae gag gah gar gas gat gca gcc gce gcg gch gcr gcs gct ge- gea gec gee geg geh ger ges get gga ggc ggg ggh ggr ggs ggt gha ghc ghe ghg ghh ghr ghs ght gra grc gre grg grh grr grs grt gsa gsc gse gsg gsr gss gst gta gtc gte gtg gth gtr gts gtt haa hac hae hag hah har has hat hca hcc hce hcg hch hcr hcs hct he- hea hec hee heg heh her hes het hga hgc hge hgg hgh hgr hgs hgt hha hhc hhe hhg hhh hhr hhs hht hr- hra hrc hre hrg hrh hrr hrs hrt hsa hsc hse hsg hsh hsr hss hst hta htc hte htg hth htr hts htt ra- raa rac rae rag rah rar ras rat rca rcc rce rcg rch rcr rcs rct re- rea rec ree reg reh rer res ret rga rgc rge rgg rgh rgr rgs rgt rh- rha rhc rhe rhg rhh rhr rhs rht rra rrc rrg rrh rrr rrs rrt rsa rsc rse rsg rsh rsr rss rst rta rtc rte rtg rtr rts rtt saa sac sae sag sah sar sas sat sca scc sce scg sch scr scs sct se- sea sec see seg seh ser ses set sga sgc sge sgg sgh sgr sgs sgt sh- sha shc she shg shh shr shs sht sr- sra src sre srg srh srr srs srt ss- ssa ssc sse ssg ssh ssr sss sst sta stc ste stg sth str sts stt taa tac tae tag tah tar tas tat tca tcc tce tcg tch tcr tcs tct te- tea tec tee teg teh ter tes tet tga tgc tge tgg tgh tgr tgs tgt th- tha thc the thg thh thr ths tht tra trc tre trg trh trr trs trt tsa tsc tse tsg tsh tsr tss tst tta ttc tte ttg tth ttr tts ttt