cccc cccp ccee ccpe ccpp ccpr ccrc ccre ccrp cec- cece cecp ceec ceke cepc cepe cepp cepr cer- cerc cere cerp ckck cker ckpc ckpr ckrc cpce cpep cper cpre crcc crce crcr cre- crec cree crep crkc crkp crpc eccc ecce ecpp ecrc ecrr eeee eeke eerc ekek eker ekpe epcc epec epee eper eppc eppp eprp ercc erce ercp erec erer erke erpe errc erre kccc kcck kccr kcec kcee kcep kckc kckk kckr kcpc kcpr kcrc kcrp kcrr keck kecr keek keep keer kekc keke kep- kepc kepe ker- kerc kere kerk kerp kerr kkck kkcr kkkk kkpc kkpk kkrc kkre kkrk kkrr kpcc kpcr kpek kper kpke kpkk kpkr kppc kppk kppp kppr kprc kpre kprk kprp kprr krcc krce krec kree krek krkc krke krkk krkr krpr krrc krre krrk krrr pccc pcce pcep pcer pcpp pcrc pcre pece peck pecr peec peek peep peer peke pekk pepe per- perc pere perk perp perr ppcc pper pppp pprc prcc prcp pre- prec pree prek prep rccc rcep recc rece reck recp recr reek reep reke repe repp repr rere rrrr