cccc cccf cccp ccee ccfc ccff ccoc ccpe ccpp ccpr ccrc ccre ccrf ccrp cec- cece ceco cecp ceec cef- cefc ceop ceor cepc cepe cepo cepp cepr cer- cerc cere cerf cero cerp cfcf cfco cffr cfor cfpo cfpr cfre cfrp coce coco cocp coep cofc cofe coff coof coop cope copo copp copr cor- corc core corf coro corp corr cpce cpep cper cpff cpre crcc crce crcr cre- crec cree creo crep crfc croc croe croo crop cror crpc eccc ecce ecco ecef ecfc ecfr eco- ecop ecpp ecrc ecrf ecrr eeee eefe eeoc eerc eero efco efeo efor eore epcc epec epee eper epfc epoc epor eppc eppo eppp epro eprp ercc erce ercp erec erer erfc eroc eroe eroo erpe errc erre erro fccf fccp fece feer fefc fefe feff fefo feof fepc ferc fere fero ferr ffcc ffee ffff ffrr foce foco foer fofo foof fopp for- fore foro forr fp-c fpcc fprf frcc frcp free freo frep frfc froe frop o-eo occc oce ocee ocef ocfp ocpp ocre ocro ocrr oec- oecc oeec oere ofcr ofer off- offc offe offo offr ofor ofre oocr ooer ooff oooo oore opec opep oper opo- opor oppo orce orco ore- orec oreo orer orfe orff oro- oroe orof oror orpc orpe orro pccc pcce pcep pcer pcfc pcoe pcpp pcrc pcre pcrf pece peco pecr peec peep peer pefc peff peor pepe pepo per- perc pere perf pero perp perr pfce pfff pffr poce poco poer poff poof poop poor pop- popc pope popo popp porc pore poro porr ppcc pper pppo pppp pprc pprf prcc prcf prcp pre- prec pree pref prep prfc pro- proc proe prof proo prop rccc rcep rcfc rcpo recc rece recp recr reef reep refe reff refr reof reop repe repo repp repr rere rero rfef rffc rocc roce roco roer rofc rofe roff rofo roof roop roor rope ropo rorc rore roro rpfc rpoe rpof rrfc rrrr