-er a-a a-c aaa aac aae aaj aak aao aar aas ac- aca acc ace acj ack aco acr acs aea aec aee aej aek aeo aer aes aja ajc aje ajj ajk ajo ajr ajs aka akc ake akj akk ako akr aks aoa aoc aoe aoj aok aoo aor aos ar- ara arc are arj ark aro arr ars as- asa asc ase asj ask aso asr ass c-- c-j caa cac cae caj cak cao car cas cca ccc cce ccj cck cco ccr ccs ce- cea cec cee cej cek ceo cer ces cja cjc cjk cjr cjs cka ckc cko cks co- coa coc coe coj cok coo cor cos cra crc cre crj crk cro crr crs csa csc cse csj csk cso csr css eaa eac eae eaj eak eao ear eas ec- eca ecc ece ecj eck eco ecr ecs eea eec eee eek eeo eer ees eja ejc ejo eka ekc eke eko ekr eks eo- eoa eoc eoe eok eoo eor eos era erc ere erk ero err ers es- esa esc ese esk eso esr ess jaa jac jae jaj jak jao jar jas jca jcc jce jck jco jcr jcs jea jec jee jej jek jeo jer jes jja jjc jjj jjk jjr jjs jka jkk jko jkr jks joa joc joe joj jok joo jor jos jra jrc jrk jro jrr jrs jsa jsc jse jsj jsk jso jsr jss ka- kaa kac kae kaj kak kao kar kas kca kcc kce kck kcr kcs ke- kea kec kee kek keo ker kes kjc kje kjr kjs kkc kke kkk kkr kks koa koc koe kok koo kor kos kra krc krk kro krr krs ksa ksc kse ksk kso ksr kss oaa oac oae oaj oak oao oar oas oc- oca occ ocj ock oco ocr ocs oea oec oee oeo oer oes oja ojc oje ojo ojs oka okc oke okj okk oko okr oks oo- ooa ooc ook ooo oor oos or- ora orc ore ork oro orr ors os- osa osc ose osj osk oso osr oss ra- raa rac rae raj rak rao rar ras rca rcc rce rcj rco rcr rcs re- rea rec ree rek reo rer res rja rjc rjk rjr rkc rke rkk rko rks roa roc roe roj rok roo ror ros rra rrc rrk rrr rrs rsa rsc rse rsj rsk rso rsr rss saa sac sae saj sak sao sar sas sca scc sce scj sck sco scr scs se- sea sec see sej sek seo ser ses sja sjc sje sjj sjk sjr sjs sk- ska skc ske skj skk sko skr sks soa soc soe soj sok soo sor sos sr- sra src sre srj srk sro srr srs ss- ssa ssc sse ssj ssk sso ssr sss