-er -ey c-- ccc cce ccg cco ccp ccr ce- cec cee ceg ceo cep cer cey cgc cge cgg cgo cgp cgr cgy co- coc coe cog coo cop cor coy cpc cpe cpg cpo cpp cpr crc cre crg cro crp crr cry cyc cye cyg cyo cyp cyr ec- ecc ece ecg eco ecr eec eee eeg eeo eep eer eey egc ege egg ego egp egr egy eo- eoc eoe eog eoo eop eor ep- epc epe epg epo epp epr erc ere erg ero erp err ery eyc eye eyo eyp eyr g-p gcc gce gcg gco gcp gcr ge- gec gee geg geo gep ger gey ggc ggg ggo ggp ggr goc goe gog goo gop gor goy gpc gpe gpg gpo gpp gpr grc gre grg gro grp grr gry gy- gye gyo gyp gyr oc- occ ocg oco ocp ocr oec oee oeg oeo oep oer oey ogc oge ogg ogo ogp ogy oo- ooc oog ooo oop oor op- opc ope opg opo opp opr opy or- orc ore org oro orp orr ory oye oyo p-p pcc pce pcg pco pcp pcr pec pee peg peo pep per pey pgc pge pgg pgo pgp pgr pgy poc poe pog poo pop por poy ppc ppe ppg ppo ppp ppr prc pre prg pro prp prr pry py- pyc pye pyg pyo pyr rcc rce rcg rco rcp rcr re- rec ree reg reo rep rer rey rgc rge rgg rgo rgp rgr roc roe rog roo rop ror roy rpc rpe rpg rpo rpp rpr rrc rrg rrp rrr ry- ryc rye ryg ryo ryr ryy ycc yce yco ycp ycy yec yee yeg yeo yep yer yey ygc ygo yoc yoe yog yoo yop yor yoy ypg ypo yrc yre yrg yro yrp yyc yye yyg yyy