-er a-a a-c a-t aaa aac aad aae aag aar aas aat ac- aca acc acd ace acg acr acs act ad- ada adc add ade adg adr ads adt aea aec aed aee aeg aer aes aet ag- aga agc agd age agg agr ags agt ar- ara arc ard are arg arr ars art as- asa asc asd ase asg asr ass ast at- ata atc atd ate atg atr ats att c-- caa cac cad cae cag car cas cat cca ccc ccd cce ccg ccr ccs cct cda cdc cdd cde cdg cdr cds cdt ce- cea cec ced cee ceg cer ces cet cga cgc cgd cge cgg cgr cgs cgt cra crc crd cre crg crr crs crt csa csc csd cse csg csr css cst cta ctc ctd cte ctg ctr cts ctt daa dac dad dae dag dar das dat dca dcc dcd dce dcg dcr dcs dct dda ddc ddd dde ddg ddr dds ddt de- dea dec ded dee deg der des det dga dgc dgd dge dgg dgr dgs dgt dra drc drd dre drg drr drs drt dsa dsc dsd dse dsg dsr dss dst dta dtc dtd dte dtg dtr dts dtt eaa eac ead eae eag ear eas eat ec- eca ecc ecd ece ecg ecr ecs ect ed- eda edc edd ede edg edr eds edt eea eec eed eee eeg eer ees eet ega egc egd ege egg egr egs egt era erc erd ere erg err ers ert es- esa esc esd ese esg esr ess est eta etc etd ete etg etr ets ett g-d gaa gac gad gae gag gar gas gat gca gcc gcd gce gcg gcr gcs gct gda gdc gdd gde gdr gds gdt ge- gea gec ged gee geg ger ges get gga ggc ggd ggg ggr ggs ggt gra grc grd gre grg grr grs grt gsa gsc gsd gse gsg gsr gss gst gta gtc gtd gte gtg gtr gts gtt ra- raa rac rad rae rag rar ras rat rca rcc rcd rce rcg rcr rcs rct rda rdc rdd rde rdg rdr rds rdt re- rea rec red ree reg rer res ret rga rgc rgd rge rgg rgr rgs rgt rra rrc rrd rrg rrr rrs rrt rsa rsc rsd rse rsg rsr rss rst rta rtc rtd rte rtg rtr rts rtt saa sac sad sae sag sar sas sat sca scc scd sce scg scr scs sct sda sdc sdd sde sdg sdr sds sdt se- sea sec sed see seg ser ses set sga sgc sgd sge sgg sgr sgs sgt sr- sra src srd sre srg srr srs srt ss- ssa ssc ssd sse ssg ssr sss sst sta stc std ste stg str sts stt taa tac tad tae tag tar tas tat tca tcc tcd tce tcg tcr tcs tct tda tdc tdd tde tdg tdr tds tdt te- tea tec ted tee teg ter tes tet tga tgc tge tgg tgr tgs tgt tra trc trd tre trg trr trs trt tsa tsc tsd tse tsg tsr tss tst tta ttc ttd tte ttg ttr tts ttt