cccc cccp ccee ccoc ccpe ccpp ccpr ccrc ccre ccrp cec- cece ceco cecp ceec ceke ceop ceor cepc cepe cepo cepp cepr cer- cerc cere cero cerp ckck ckco cker ckoc ckoo ckor ckpc ckpr ckrc coce cock coco cocp coep cok- coke coko cook coop cope copo copp copr cor- corc core cork coro corp corr cpce cpep cper cpre crcc crce crcr cre- crec cree creo crep crkc crkp croc croe crok croo crop cror crpc eccc ecce ecco ecko eco- ecop ecpp ecrc ecrr eeee eeke eeoc eerc eero ekco ekek eker ekpe ekpo eore epcc epec epee eper epoc epor eppc eppo eppp epro eprp ercc erce ercp erec erer erke eroc eroe eroo erpe errc erre erro kccc kcck kccr kcec kcee kceo kcep kckc kckk kcko kckr kcoe kcor kcpc kcpo kcpr kcrc kcro kcrp kcrr keck keco kecr keek keep keer kekc keke keko keok kep- kepc kepe ker- kerc kere kerk kero kerp kerr kkck kkco kkcr kkkk kkoo kkor kkpc kkpk kkrc kkre kkrk kkro kkrr kock kocp kokc koke kokk koko kokp kokr kooc kook kooo koop koor kope kopp kopr korc kore kork koro korr kpcc kpcr kpek kper kpke kpkk kpkr kpoc kpoe kpok kpoo kpop kppc kppk kppo kppp kppr kprc kpre kprk kpro kprp kprr krcc krce krco krec kree krek kreo krkc krke krkk krko krkr kroc kroe krok kroo krop kror krpr krrc krre krrk krro krrr o-eo occc oce ocee ocke ocpp ocre ocro ocrr oec- oecc oeec oere oker okko okok okor okpe okpo okre okro oocr ooer oooo oore opec opep oper opo- opor oppo orce orco ore- orec orek oreo orer orke orko oro- oroe orok oror orpc orpe orro pccc pcce pcep pcer pcoe pcpp pcrc pcre pece peck peco pecr peec peek peep peer peke pekk peko peor pepe pepo per- perc pere perk pero perp perr poce pock poco poer poke poko pook poop poor pop- popc pope popo popp porc pore pork poro porr ppcc pper pppo pppp pprc prcc prcp pre- prec pree prek prep pro- proc proe proo prop rccc rcep rcpo recc rece reck recp recr reek reep reke reko reop repe repo repp repr rere rero rocc roce rock roco roer roke rokk roko rokr rook roop roor rope ropo rorc rore rork roro rpoe rrrr