-er a-a a-c aaa aac aae aag aaj aao aar aas ac- aca acc ace acg acj aco acr acs aea aec aee aeg aej aeo aer aes ag- aga agc age agg agj ago agr ags aja ajc aje ajj ajo ajr ajs aoa aoc aoe aog aoj aoo aor aos ar- ara arc are arg arj aro arr ars as- asa asc ase asg asj aso asr ass c-- c-j caa cac cae cag caj cao car cas cca ccc cce ccg ccj cco ccr ccs ce- cea cec cee ceg cej ceo cer ces cga cgc cge cgg cgo cgr cgs cja cjc cjg cjr cjs co- coa coc coe cog coj coo cor cos cra crc cre crg crj cro crr crs csa csc cse csg csj cso csr css eaa eac eae eag eaj eao ear eas ec- eca ecc ece ecg ecj eco ecr ecs eea eec eee eeg eeo eer ees ega egc ege egg ego egr egs eja ejc ejo eo- eoa eoc eoe eog eoo eor eos era erc ere erg ero err ers es- esa esc ese esg eso esr ess gaa gac gae gag gaj gao gar gas gca gcc gce gcg gco gcr gcs ge- gea gec gee geg geo ger ges gga ggc ggg ggj ggo ggr ggs gja gjc gje gjg gjr goa goc goe gog goo gor gos gra grc gre grg grj gro grr grs gsa gsc gse gsg gsj gso gsr gss jaa jac jae jag jaj jao jar jas jca jcc jce jco jcr jcs jea jec jee jeg jej jeo jer jes jga jge jgo jgr jgs jja jjc jjg jjj jjr jjs joa joc joe jog joj joo jor jos jra jrc jrg jro jrr jrs jsa jsc jse jsg jsj jso jsr jss oaa oac oae oag oaj oao oar oas oc- oca occ ocg ocj oco ocr ocs oea oec oee oeg oeo oer oes oga ogc oge ogg ogo ogs oja ojc oje ojo ojs oo- ooa ooc oog ooo oor oos or- ora orc ore org oro orr ors os- osa osc ose osg osj oso osr oss ra- raa rac rae rag raj rao rar ras rca rcc rce rcg rcj rco rcr rcs re- rea rec ree reg reo rer res rga rgc rge rgg rgo rgr rgs rja rjc rjg rjr roa roc roe rog roj roo ror ros rra rrc rrg rrr rrs rsa rsc rse rsg rsj rso rsr rss saa sac sae sag saj sao sar sas sca scc sce scg scj sco scr scs se- sea sec see seg sej seo ser ses sga sgc sge sgg sgo sgr sgs sja sjc sje sjj sjr sjs soa soc soe sog soj soo sor sos sr- sra src sre srg srj sro srr srs ss- ssa ssc sse ssg ssj sso ssr sss