-er -ey c-- ccc cce ccg cco ccp ccr ccs ce- cec cee ceg ceo cep cer ces cey cgc cge cgg cgo cgp cgr cgs cgy co- coc coe cog coo cop cor cos coy cpc cpe cpg cpo cpp cpr cps crc cre crg cro crp crr crs cry csc cse csg cso csp csr css csy cyc cye cyg cyo cyp cyr cys ec- ecc ece ecg eco ecr ecs eec eee eeg eeo eep eer ees eey egc ege egg ego egp egr egs egy eo- eoc eoe eog eoo eop eor eos ep- epc epe epg epo epp epr eps erc ere erg ero erp err ers ery es- esc ese esg eso esp esr ess esy eyc eye eyo eyp eyr eys g-p gcc gce gcg gco gcp gcr gcs ge- gec gee geg geo gep ger ges gey ggc ggg ggo ggp ggr ggs goc goe gog goo gop gor gos goy gpc gpe gpg gpo gpp gpr gps grc gre grg gro grp grr grs gry gsc gse gsg gso gsp gsr gss gy- gye gyo gyp gyr gys oc- occ ocg oco ocp ocr ocs oec oee oeg oeo oep oer oes oey ogc oge ogg ogo ogp ogs ogy oo- ooc oog ooo oop oor oos op- opc ope opg opo opp opr ops opy or- orc ore org oro orp orr ors ory os- osc ose osg oso osp osr oss oye oyo oys p-p pcc pce pcg pco pcp pcr pcs pec pee peg peo pep per pes pey pgc pge pgg pgo pgp pgr pgs pgy poc poe pog poo pop por pos poy ppc ppe ppg ppo ppp ppr pps prc pre prg pro prp prr prs pry ps- psc pse psg pso psp psr pss psy py- pyc pye pyg pyo pyr pys rcc rce rcg rco rcp rcr rcs re- rec ree reg reo rep rer res rey rgc rge rgg rgo rgp rgr rgs roc roe rog roo rop ror ros roy rpc rpe rpg rpo rpp rpr rps rrc rrg rrp rrr rrs rsc rse rsg rso rsp rsr rss ry- ryc rye ryg ryo ryr rys ryy scc sce scg sco scp scr scs se- sec see seg seo sep ser ses sey sgc sge sgg sgo sgp sgr sgs soc soe sog soo sop sor sos soy spc spe spg spo spp spr sps spy sr- src sre srg sro srp srr srs sry ss- ssc sse ssg sso ssp ssr sss sy- syc sye syg syp syr sys ycc yce yco ycp ycs ycy yec yee yeg yeo yep yer yes yey ygc ygo yoc yoe yog yoo yop yor yos yoy ypg ypo yps yrc yre yrg yro yrp yrs ysc yse ysg yso ysp ysr yss ysy yyc yye yyg yys yyy