-er a-a a-c a-t aaa aac aae aag aap aar aas aat ac- aca acc ace acg acp acr acs act aea aec aee aeg aep aer aes aet ag- aga agc age agg agp agr ags agt ap- apa apc ape apg app apr aps apt ar- ara arc are arg arp arr ars art as- asa asc ase asg asp asr ass ast at- ata atc ate atg atp atr ats att c-- caa cac cae cag cap car cas cat cca ccc cce ccg ccp ccr ccs cct ce- cea cec cee ceg cep cer ces cet cga cgc cge cgg cgp cgr cgs cgt cpa cpc cpe cpg cpp cpr cps cpt cra crc cre crg crp crr crs crt csa csc cse csg csp csr css cst cta ctc cte ctg ctp ctr cts ctt eaa eac eae eag eap ear eas eat ec- eca ecc ece ecg ecr ecs ect eea eec eee eeg eep eer ees eet ega egc ege egg egp egr egs egt ep- epa epc epe epg epp epr eps ept era erc ere erg erp err ers ert es- esa esc ese esg esp esr ess est eta etc ete etg etp etr ets ett g-p gaa gac gae gag gap gar gas gat gca gcc gce gcg gcp gcr gcs gct ge- gea gec gee geg gep ger ges get gga ggc ggg ggp ggr ggs ggt gpa gpc gpe gpg gpp gpr gps gpt gra grc gre grg grp grr grs grt gsa gsc gse gsg gsp gsr gss gst gta gtc gte gtg gtp gtr gts gtt p-p paa pac pae pag pap par pas pat pca pcc pce pcg pcp pcr pcs pct pea pec pee peg pep per pes pet pga pgc pge pgg pgp pgr pgs pgt ppa ppc ppe ppg ppp ppr pps ppt pra prc pre prg prp prr prs prt ps- psa psc pse psg psp psr pss pst pt- pta ptc pte ptg ptp ptr pts ptt ra- raa rac rae rag rap rar ras rat rca rcc rce rcg rcp rcr rcs rct re- rea rec ree reg rep rer res ret rga rgc rge rgg rgp rgr rgs rgt rpa rpc rpe rpg rpp rpr rps rpt rra rrc rrg rrp rrr rrs rrt rsa rsc rse rsg rsp rsr rss rst rta rtc rte rtg rtp rtr rts rtt saa sac sae sag sap sar sas sat sca scc sce scg scp scr scs sct se- sea sec see seg sep ser ses set sga sgc sge sgg sgp sgr sgs sgt spa spc spe spg spp spr sps spt sr- sra src sre srg srp srr srs srt ss- ssa ssc sse ssg ssp ssr sss sst sta stc ste stg stp str sts stt taa tac tae tag tap tar tas tat tca tcc tce tcg tcp tcr tcs tct te- tea tec tee teg tep ter tes tet tga tgc tge tgg tgp tgr tgs tgt tpa tpc tpe tpg tpp tpr tps tpt tra trc tre trg trp trr trs trt tsa tsc tse tsg tsp tsr tss tst tta ttc tte ttg ttp ttr tts ttt