cccc cccp ccee ccoc ccpe ccpp ccpr ccrc ccre ccrp cec- cece ceco cecp ceec ceop ceor cepc cepe cepo cepp cepr cer- cerc cere cero cerp coce coco cocp coep coop cope copo copp copr cor- corc core coro corp corr cpce cpep cper cpre crcc crce crcr cre- crec cree creo crep croc croe croo crop cror crpc eccc ecce ecco eco- ecop ecpp ecrc ecrr eeee eeoc eerc eero eore epcc epec epee eper epoc epor eppc eppo eppp epro eprp ercc erce ercp erec erer eroc eroe eroo erpe errc erre erro o-eo occc oce ocee ocpp ocre ocro ocrr oec- oecc oeec oere oocr ooer oooo oore opec opep oper opo- opor oppo opqr orce orco ore- orec oreo orer oro- oroe oror orpc orpe orro pccc pcce pcep pcer pcoe pcpp pcrc pcre pece peco pecq pecr peec peep peer peor pepe pepo per- perc pere pero perp perq perr poce poco poer poop poor pop- popc pope popo popp porc pore poro porr ppcc pper pppo pppp pprc pqcc prcc prcp pre- prec pree prep pro- proc proe proo prop qeep qere qero qerq qoop qore qqqq rccc rcep rcpo recc rece recp recr reep reop repe repo repp repr rere rero rocc roce roco roer roop roor rope ropo rorc rore roro rpoe rrrr