-er a-a a-c aaa aac aae aag aah aao aap aar aas ac- aca acc ace acg ach aco acp acr acs aea aec aee aeg aeh aeo aep aer aes ag- aga agc age agg agh ago agp agr ags aha ahc ahe ahg ahh aho ahp ahr ahs aoa aoc aoe aog aoh aoo aop aor aos ap- apa apc ape apg aph apo app apr aps ar- ara arc are arg arh aro arp arr ars as- asa asc ase asg ash aso asp asr ass c-- caa cac cae cag cah cao cap car cas cca ccc cce ccg cch cco ccp ccr ccs ce- cea cec cee ceg ceh ceo cep cer ces cga cgc cge cgg cgh cgo cgp cgr cgs ch- cha chc che chg chh cho chp chr chs co- coa coc coe cog coh coo cop cor cos cpa cpc cpe cpg cph cpo cpp cpr cps cra crc cre crg crh cro crp crr crs csa csc cse csg csh cso csp csr css eaa eac eae eag eah eao eap ear eas ec- eca ecc ece ecg ech eco ecr ecs eea eec eee eeg eeo eep eer ees ega egc ege egg egh ego egp egr egs eha ehc ehe ehg ehh eho ehp ehr ehs eo- eoa eoc eoe eog eoh eoo eop eor eos ep- epa epc epe epg eph epo epp epr eps era erc ere erg erh ero erp err ers es- esa esc ese esg esh eso esp esr ess g-p gaa gac gae gag gah gao gap gar gas gca gcc gce gcg gch gco gcp gcr gcs ge- gea gec gee geg geh geo gep ger ges gga ggc ggg ggh ggo ggp ggr ggs gha ghc ghe ghg ghh gho ghp ghr ghs goa goc goe gog goh goo gop gor gos gpa gpc gpe gpg gph gpo gpp gpr gps gra grc gre grg grh gro grp grr grs gsa gsc gse gsg gso gsp gsr gss haa hac hae hag hah hao hap har has hca hcc hce hcg hch hco hcp hcr hcs he- hea hec hee heg heh heo hep her hes hga hgc hge hgg hgh hgo hgp hgr hgs hha hhc hhe hhg hhh hho hhp hhr hhs hoa hoc hoe hog hoh hoo hop hor hos hpa hpc hpe hpg hph hpo hpp hpr hps hr- hra hrc hre hrg hrh hro hrp hrr hrs hsa hsc hse hsg hsh hsp hsr hss oaa oac oae oag oah oao oap oar oas oc- oca occ ocg och oco ocp ocr ocs oea oec oee oeg oeh oeo oep oer oes oga ogc oge ogg ogh ogo ogp ogs oha ohc ohe ohg ohh oho ohp ohr ohs oo- ooa ooc oog ooh ooo oop oor oos op- opa opc ope opg oph opo opp opr ops or- ora orc ore org orh oro orp orr ors os- osa osc ose osg osh oso osp osr oss p-p paa pac pae pag pah pao pap par pas pca pcc pce pcg pch pco pcp pcr pcs pea pec pee peg peh peo pep per pes pga pgc pge pgg pgh pgo pgp pgr pgs pha phc phe phg pho php phr phs poa poc poe pog poh poo pop por pos ppa ppc ppe ppg pph ppo ppp ppr pps pra prc pre prg prh pro prp prr prs ps- psa psc pse psg psh pso psp psr pss ra- raa rac rae rag rah rao rap rar ras rca rcc rce rcg rch rco rcp rcr rcs re- rea rec ree reg reh reo rep rer res rga rgc rge rgg rgh rgo rgp rgr rgs rh- rha rhc rhe rhg rhh rho rhp rhr rhs roa roc roe rog roh roo rop ror ros rpa rpc rpe rpg rph rpo rpp rpr rps rra rrc rrg rrh rrp rrr rrs rsa rsc rse rsg rsh rso rsp rsr rss saa sac sae sag sah sao sap sar sas sca scc sce scg sch sco scp scr scs se- sea sec see seg seh seo sep ser ses sga sgc sge sgg sgh sgo sgp sgr sgs sh- sha shc she shg shh sho shp shr shs soa soc soe sog soh soo sop sor sos spa spc spe spg sph spo spp spr sps sr- sra src sre srg srh sro srp srr srs ss- ssa ssc sse ssg ssh sso ssp ssr sss