-er a-a a-c aaa aac aae aag aah aak aao aar aas ac- aca acc ace acg ach ack aco acr acs aea aec aee aeg aeh aek aeo aer aes ag- aga agc age agg agh agk ago agr ags aha ahc ahe ahg ahh ahk aho ahr ahs aka akc ake akg akh akk ako akr aks aoa aoc aoe aog aoh aok aoo aor aos ar- ara arc are arg arh ark aro arr ars as- asa asc ase asg ash ask aso asr ass c-- caa cac cae cag cah cak cao car cas cca ccc cce ccg cch cck cco ccr ccs ce- cea cec cee ceg ceh cek ceo cer ces cga cgc cge cgg cgh cgo cgr cgs ch- cha chc che chg chh chk cho chr chs cka ckc ckh cko cks co- coa coc coe cog coh cok coo cor cos cra crc cre crg crh crk cro crr crs csa csc cse csg csh csk cso csr css eaa eac eae eag eah eak eao ear eas ec- eca ecc ece ecg ech eck eco ecr ecs eea eec eee eeg eek eeo eer ees ega egc ege egg egh ego egr egs eha ehc ehe ehg ehh eho ehr ehs eka ekc eke ekg ekh eko ekr eks eo- eoa eoc eoe eog eoh eok eoo eor eos era erc ere erg erh erk ero err ers es- esa esc ese esg esh esk eso esr ess gaa gac gae gag gah gak gao gar gas gca gcc gce gcg gch gck gco gcr gcs ge- gea gec gee geg geh gek geo ger ges gga ggc ggg ggh ggo ggr ggs gha ghc ghe ghg ghh gho ghr ghs gka gkh gko gks goa goc goe gog goh gok goo gor gos gra grc gre grg grh grk gro grr grs gsa gsc gse gsg gsk gso gsr gss haa hac hae hag hah hak hao har has hca hcc hce hcg hch hck hco hcr hcs he- hea hec hee heg heh hek heo her hes hga hgc hge hgg hgh hgk hgo hgr hgs hha hhc hhe hhg hhh hhk hho hhr hhs hka hkg hkh hkk hko hkr hks hoa hoc hoe hog hoh hok hoo hor hos hr- hra hrc hre hrg hrh hrk hro hrr hrs hsa hsc hse hsg hsh hsk hsr hss ka- kaa kac kae kag kah kak kao kar kas kca kcc kce kcg kch kck kcr kcs ke- kea kec kee keg keh kek keo ker kes kga kgc kgh kgo kgs kha khe khh khk kho khr khs kkc kke kkh kkk kkr kks koa koc koe kog koh kok koo kor kos kra krc krg krk kro krr krs ksa ksc kse ksg ksh ksk kso ksr kss oaa oac oae oag oah oak oao oar oas oc- oca occ ocg och ock oco ocr ocs oea oec oee oeg oeh oeo oer oes oga ogc oge ogg ogh ogo ogs oha ohc ohe ohg ohh oho ohr ohs oka okc oke okg okk oko okr oks oo- ooa ooc oog ooh ook ooo oor oos or- ora orc ore org orh ork oro orr ors os- osa osc ose osg osh osk oso osr oss ra- raa rac rae rag rah rak rao rar ras rca rcc rce rcg rch rco rcr rcs re- rea rec ree reg reh rek reo rer res rga rgc rge rgg rgh rgk rgo rgr rgs rh- rha rhc rhe rhg rhh rho rhr rhs rkc rke rkg rkk rko rks roa roc roe rog roh rok roo ror ros rra rrc rrg rrh rrk rrr rrs rsa rsc rse rsg rsh rsk rso rsr rss saa sac sae sag sah sak sao sar sas sca scc sce scg sch sck sco scr scs se- sea sec see seg seh sek seo ser ses sga sgc sge sgg sgh sgk sgo sgr sgs sh- sha shc she shg shh shk sho shr shs sk- ska skc ske skg skh skk sko skr sks soa soc soe sog soh sok soo sor sos sr- sra src sre srg srh srk sro srr srs ss- ssa ssc sse ssg ssh ssk sso ssr sss