-er a-a a-c aaa aac aad aae aag aao aar aas ac- aca acc acd ace acg aco acr acs ad- ada adc add ade adg ado adr ads aea aec aed aee aeg aeo aer aes ag- aga agc agd age agg ago agr ags aoa aoc aod aoe aog aoo aor aos ar- ara arc ard are arg aro arr ars as- asa asc asd ase asg aso asr ass c-- caa cac cad cae cag cao car cas cca ccc ccd cce ccg cco ccr ccs cda cdc cdd cde cdg cdo cdr cds ce- cea cec ced cee ceg ceo cer ces cga cgc cgd cge cgg cgo cgr cgs co- coa coc cod coe cog coo cor cos cra crc crd cre crg cro crr crs csa csc csd cse csg cso csr css daa dac dad dae dag dao dar das dca dcc dcd dce dcg dco dcr dcs dda ddc ddd dde ddg ddo ddr dds de- dea dec ded dee deg deo der des dga dgc dgd dge dgg dgr dgs doa doc dod doe dog doo dor dos dra drc drd dre drg dro drr drs dsa dsc dsd dse dsg dso dsr dss eaa eac ead eae eag eao ear eas ec- eca ecc ecd ece ecg eco ecr ecs ed- eda edc edd ede edg edo edr eds eea eec eed eee eeg eeo eer ees ega egc egd ege egg ego egr egs eo- eoa eoc eod eoe eog eoo eor eos era erc erd ere erg ero err ers es- esa esc esd ese esg eso esr ess g-d gaa gac gad gae gag gao gar gas gca gcc gcd gce gcg gco gcr gcs gda gdc gdd gde gdo gdr gds ge- gea gec ged gee geg geo ger ges gga ggc ggd ggg ggo ggr ggs goa goc god goe gog goo gor gos gra grc grd gre grg gro grr grs gsa gsc gsd gse gsg gso gsr gss oaa oac oad oae oag oao oar oas oc- oca occ ocd ocg oco ocr ocs oda odc odd ode odg odo odr ods oea oec oed oee oeg oeo oer oes oga ogc ogd oge ogg ogo ogs oo- ooa ooc ood oog ooo oor oos or- ora orc ord ore org oro orr ors os- osa osc osd ose osg oso osr oss ra- raa rac rad rae rag rao rar ras rca rcc rcd rce rcg rco rcr rcs rda rdc rdd rde rdg rdo rdr rds re- rea rec red ree reg reo rer res rga rgc rgd rge rgg rgo rgr rgs roa roc rod roe rog roo ror ros rra rrc rrd rrg rrr rrs rsa rsc rsd rse rsg rso rsr rss saa sac sad sae sag sao sar sas sca scc scd sce scg sco scr scs sda sdc sdd sde sdg sdo sdr sds se- sea sec sed see seg seo ser ses sga sgc sgd sge sgg sgo sgr sgs soa soc sod soe sog soo sor sos sr- sra src srd sre srg sro srr srs ss- ssa ssc ssd sse ssg sso ssr sss