-er a-a a-c a-t aaa aac aae aag aar aas aat ac- aca acc ace acg acr acs act aea aec aee aeg aer aes aet ag- aga agc age agg agr ags agt ar- ara arc are arg arr ars art as- asa asc ase asg asr ass ast at- ata atc ate atg atr ats att c-- caa cac cae cag car cas cat cca ccc cce ccg ccr ccs cct ce- cea cec cee ceg cer ces cet cga cgc cge cgg cgr cgs cgt cra crc cre crg crr crs crt csa csc cse csg csr css cst cta ctc cte ctg ctr cts ctt eaa eac eae eag ear eas eat ec- eca ecc ece ecg ecr ecs ect eea eec eee eeg eer ees eet ega egc ege egg egr egs egt era erc ere erg err ers ert es- esa esc ese esg esr ess est eta etc ete etg etr ets ett gaa gac gae gag gar gas gat gca gcc gce gcg gcr gcs gct ge- gea gec gee geg ger ges get gga ggc ggg ggr ggs ggt gra grc gre grg grr grs grt gsa gsc gse gsg gsr gss gst gta gtc gte gtg gtr gts gtt ra- raa rac rae rag rar ras rat rca rcc rce rcg rcr rcs rct re- rea rec ree reg rer res ret rga rgc rge rgg rgr rgs rgt rra rrc rrg rrr rrs rrt rsa rsc rse rsg rsr rss rst rta rtc rte rtg rtr rts rtt saa sac sae sag sar sas sat sca scc sce scg scr scs sct se- sea sec see seg ser ses set sga sgc sge sgg sgr sgs sgt sr- sra src sre srg srr srs srt ss- ssa ssc sse ssg ssr sss sst sta stc ste stg str sts stt taa tac tae tag tar tas tat tca tcc tce tcg tcr tcs tct te- tea tec tee teg ter tes tet tga tgc tge tgg tgr tgs tgt tra trc tre trg trr trs trt tsa tsc tse tsg tsr tss tst tta ttc tte ttg ttr tts ttt