-er a-a a-c a-t aaa aac aad aae aag aap aar aas aat ac- aca acc acd ace acg acp acr acs act ad- ada adc add ade adg adp adr ads adt aea aec aed aee aeg aep aer aes aet ag- aga agc agd age agg agp agr ags agt ap- apa apc apd ape apg app apr aps apt ar- ara arc ard are arg arp arr ars art as- asa asc asd ase asg asp asr ass ast at- ata atc atd ate atg atp atr ats att c-- caa cac cad cae cag cap car cas cat cca ccc ccd cce ccg ccp ccr ccs cct cda cdc cdd cde cdg cdp cdr cds cdt ce- cea cec ced cee ceg cep cer ces cet cga cgc cgd cge cgg cgp cgr cgs cgt cpa cpc cpd cpe cpg cpp cpr cps cpt cra crc crd cre crg crp crr crs crt csa csc csd cse csg csp csr css cst cta ctc ctd cte ctg ctp ctr cts ctt daa dac dad dae dag dap dar das dat dca dcc dcd dce dcg dcp dcr dcs dct dda ddc ddd dde ddg ddp ddr dds ddt de- dea dec ded dee deg dep der des det dga dgc dgd dge dgg dgp dgr dgs dgt dpa dpc dpd dpe dpg dpp dpr dps dpt dra drc drd dre drg drp drr drs drt dsa dsc dsd dse dsg dsp dsr dss dst dta dtc dtd dte dtg dtp dtr dts dtt eaa eac ead eae eag eap ear eas eat ec- eca ecc ecd ece ecg ecr ecs ect ed- eda edc edd ede edg edp edr eds edt eea eec eed eee eeg eep eer ees eet ega egc egd ege egg egp egr egs egt ep- epa epc epd epe epg epp epr eps ept era erc erd ere erg erp err ers ert es- esa esc esd ese esg esp esr ess est eta etc etd ete etg etp etr ets ett g-d g-p gaa gac gad gae gag gap gar gas gat gca gcc gcd gce gcg gcp gcr gcs gct gda gdc gdd gde gdp gdr gds gdt ge- gea gec ged gee geg gep ger ges get gga ggc ggd ggg ggp ggr ggs ggt gpa gpc gpd gpe gpg gpp gpr gps gpt gra grc grd gre grg grp grr grs grt gsa gsc gsd gse gsg gsp gsr gss gst gta gtc gtd gte gtg gtp gtr gts gtt p-p paa pac pad pae pag pap par pas pat pca pcc pcd pce pcg pcp pcr pcs pct pda pdc pdd pde pdg pdp pdr pds pdt pea pec ped pee peg pep per pes pet pga pgc pgd pge pgg pgp pgr pgs pgt ppa ppc ppd ppe ppg ppp ppr pps ppt pra prc prd pre prg prp prr prs prt ps- psa psc psd pse psg psp psr pss pst pt- pta ptc ptd pte ptg ptp ptr pts ptt ra- raa rac rad rae rag rap rar ras rat rca rcc rcd rce rcg rcp rcr rcs rct rda rdc rdd rde rdg rdp rdr rds rdt re- rea rec red ree reg rep rer res ret rga rgc rgd rge rgg rgp rgr rgs rgt rpa rpc rpd rpe rpg rpp rpr rps rpt rra rrc rrd rrg rrp rrr rrs rrt rsa rsc rsd rse rsg rsp rsr rss rst rta rtc rtd rte rtg rtp rtr rts rtt saa sac sad sae sag sap sar sas sat sca scc scd sce scg scp scr scs sct sda sdc sdd sde sdg sdp sdr sds sdt se- sea sec sed see seg sep ser ses set sga sgc sgd sge sgg sgp sgr sgs sgt spa spc spd spe spg spp spr sps spt sr- sra src srd sre srg srp srr srs srt ss- ssa ssc ssd sse ssg ssp ssr sss sst sta stc std ste stg stp str sts stt taa tac tad tae tag tap tar tas tat tca tcc tcd tce tcg tcp tcr tcs tct tda tdc tdd tde tdg tdp tdr tds tdt te- tea tec ted tee teg tep ter tes tet tga tgc tge tgg tgp tgr tgs tgt tpa tpc tpd tpe tpg tpp tpr tps tpt tra trc trd tre trg trp trr trs trt tsa tsc tsd tse tsg tsp tsr tss tst tta ttc ttd tte ttg ttp ttr tts ttt