-er a-a aaa aae aaf aag aao aap aar aas aea aee aef aeg aeo aep aer aes af- afa afe aff afg afo afp afr afs ag- aga age agf agg ago agp agr ags aoa aoe aof aog aoo aop aor aos ap- apa ape apf apg apo app apr aps ar- ara are arf arg aro arp arr ars as- asa ase asf asg aso asp asr ass eaa eae eaf eag eao eap ear eas eea eee eef eeg eeo eep eer ees ef- efa efe eff efg efo efp efr efs ega ege egf egg ego egp egr egs eo- eoa eoe eof eog eoo eop eor eos ep- epa epe epf epg epo epp epr eps era ere erf erg ero erp err ers es- esa ese esf esg eso esp esr ess faa fae faf fag fao fap far fas fea fee fef feg feo fep fer fes ffa ffe fff ffg ffo ffp ffr ffs fga fge fgf fgg fgp fgr fgs foa foe fof fog foo fop for fos fpa fpe fpg fpo fpp fpr fps fra fre frf frg fro frp frr frs fsa fse fsf fsg fso fsp fsr fss g-p gaa gae gaf gag gao gap gar gas ge- gea gee gef geg geo gep ger ges gfa gfe gff gfo gfp gfr gfs gga ggg ggo ggp ggr ggs goa goe gof gog goo gop gor gos gpa gpe gpf gpg gpo gpp gpr gps gra gre grf grg gro grp grr grs gsa gse gsf gsg gso gsp gsr gss oaa oae oaf oag oao oap oar oas oea oee oef oeg oeo oep oer oes of- ofa ofe off ofg ofo ofp ofr ofs oga oge ogf ogg ogo ogp ogs oo- ooa oof oog ooo oop oor oos op- opa ope opf opg opo opp opr ops or- ora ore orf org oro orp orr ors os- osa ose osf osg oso osp osr oss p-p paa pae paf pag pao pap par pas pea pee pef peg peo pep per pes pfa pfe pff pfg pfo pfp pfr pfs pga pge pgf pgg pgo pgp pgr pgs poa poe pof pog poo pop por pos ppa ppe ppf ppg ppo ppp ppr pps pra pre prf prg pro prp prr prs ps- psa pse psf psg pso psp psr pss ra- raa rae raf rag rao rap rar ras re- rea ree ref reg reo rep rer res rfa rfe rff rfg rfo rfp rfr rfs rga rge rgf rgg rgo rgp rgr rgs roa roe rof rog roo rop ror ros rpa rpe rpf rpg rpo rpp rpr rps rra rrf rrg rrp rrr rrs rsa rse rsf rsg rso rsp rsr rss saa sae saf sag sao sap sar sas se- sea see sef seg seo sep ser ses sfa sfe sff sfg sfo sfp sfr sfs sga sge sgf sgg sgo sgp sgr sgs soa soe sof sog soo sop sor sos spa spe spf spg spo spp spr sps sr- sra sre srf srg sro srp srr srs ss- ssa sse ssf ssg sso ssp ssr sss