-er eee eeg eeo eep eer ees ege egg ego egp egr egs eo- eoe eog eoo eop eor eos ep- epe epg epo epp epr eps ere erg ero erp err ers es- ese esg eso esp esr ess g-p ge- gee geg geo gep ger ges ggg ggo ggp ggr ggs goe gog goo gop gor gos gpe gpg gpo gpp gpr gps gre grg gro grp grr grs gse gsg gso gsp gsr gss oee oeg oeo oep oer oes oge ogg ogo ogp ogs oo- oog ooo oop oor oos op- ope opg opo opp opr ops or- ore org oro orp orr ors os- ose osg oso osp osr oss p-p pee peg peo pep per pes pge pgg pgo pgp pgr pgs poe pog poo pop por pos ppe ppg ppo ppp ppr pps pre prg pro prp prr prs ps- pse psg pso psp psr pss re- ree reg reo rep rer res rge rgg rgo rgp rgr rgs roe rog roo rop ror ros rpe rpg rpo rpp rpr rps rrg rrp rrr rrs rse rsg rso rsp rsr rss se- see seg seo sep ser ses sge sgg sgo sgp sgr sgs soe sog soo sop sor sos spe spg spo spp spr sps sr- sre srg sro srp srr srs ss- sse ssg sso ssp ssr sss