-er a-a a-c aaa aac aae aaf aag aah aao aar aas ac- aca acc ace acf acg ach aco acr acs aea aec aee aef aeg aeh aeo aer aes af- afa afc afe aff afg afh afo afr afs ag- aga agc age agf agg agh ago agr ags aha ahc ahe ahf ahg ahh aho ahr ahs aoa aoc aoe aof aog aoh aoo aor aos ar- ara arc are arf arg arh aro arr ars as- asa asc ase asf asg ash aso asr ass c-- caa cac cae caf cag cah cao car cas cca ccc cce ccf ccg cch cco ccr ccs ce- cea cec cee cef ceg ceh ceo cer ces cfa cfc cfe cff cfg cfh cfo cfr cfs cga cgc cge cgg cgh cgo cgr cgs ch- cha chc che chf chg chh cho chr chs co- coa coc coe cof cog coh coo cor cos cra crc cre crf crg crh cro crr crs csa csc cse csf csg csh cso csr css eaa eac eae eaf eag eah eao ear eas ec- eca ecc ece ecf ecg ech eco ecr ecs eea eec eee eef eeg eeo eer ees ef- efa efc efe eff efg efh efo efr efs ega egc ege egf egg egh ego egr egs eha ehc ehe ehf ehg ehh eho ehr ehs eo- eoa eoc eoe eof eog eoh eoo eor eos era erc ere erf erg erh ero err ers es- esa esc ese esf esg esh eso esr ess faa fac fae faf fag fah fao far fas fca fcc fce fcf fcg fco fcr fcs fea fec fee fef feg feh feo fer fes ffa ffc ffe fff ffg ffh ffo ffr ffs fga fgc fge fgf fgg fgh fgr fgs fha fhc fhe fhf fhg fhh fho fhr fhs foa foc foe fof fog foh foo for fos fra frc fre frf frg frh fro frr frs fsa fsc fse fsf fsg fsh fso fsr fss gaa gac gae gaf gag gah gao gar gas gca gcc gce gcf gcg gch gco gcr gcs ge- gea gec gee gef geg geh geo ger ges gfa gfc gfe gff gfh gfo gfr gfs gga ggc ggg ggh ggo ggr ggs gha ghc ghe ghg ghh gho ghr ghs goa goc goe gof gog goh goo gor gos gra grc gre grf grg grh gro grr grs gsa gsc gse gsf gsg gso gsr gss haa hac hae haf hag hah hao har has hca hcc hce hcf hcg hch hco hcr hcs he- hea hec hee hef heg heh heo her hes hfa hfc hfe hff hfg hfh hfo hfr hfs hga hgc hge hgf hgg hgh hgo hgr hgs hha hhc hhe hhf hhg hhh hho hhr hhs hoa hoc hoe hof hog hoh hoo hor hos hr- hra hrc hre hrf hrg hrh hro hrr hrs hsa hsc hse hsf hsg hsh hsr hss oaa oac oae oaf oag oah oao oar oas oc- oca occ ocf ocg och oco ocr ocs oea oec oee oef oeg oeh oeo oer oes of- ofa ofc ofe off ofg ofo ofr ofs oga ogc oge ogf ogg ogh ogo ogs oha ohc ohe ohf ohg ohh oho ohr ohs oo- ooa ooc oof oog ooh ooo oor oos or- ora orc ore orf org orh oro orr ors os- osa osc ose osf osg osh oso osr oss ra- raa rac rae raf rag rah rao rar ras rca rcc rce rcf rcg rch rco rcr rcs re- rea rec ree ref reg reh reo rer res rfa rfc rfe rff rfg rfh rfo rfr rfs rga rgc rge rgf rgg rgh rgo rgr rgs rh- rha rhc rhe rhf rhg rhh rho rhr rhs roa roc roe rof rog roh roo ror ros rra rrc rrf rrg rrh rrr rrs rsa rsc rse rsf rsg rsh rso rsr rss saa sac sae saf sag sah sao sar sas sca scc sce scf scg sch sco scr scs se- sea sec see sef seg seh seo ser ses sfa sfc sfe sff sfg sfh sfo sfr sfs sga sgc sge sgf sgg sgh sgo sgr sgs sh- sha shc she shf shg shh sho shr shs soa soc soe sof sog soh soo sor sos sr- sra src sre srf srg srh sro srr srs ss- ssa ssc sse ssf ssg ssh sso ssr sss