eerier effeir effere effoff effore eforie epopee er-rif eriope errori feerie feeror feifer feirie feofor ferfer ferier ferior ferrer ferri- ferrie ferro- fiefie fierro fifpro foerre foofoo fopper forrer freeof freepr frefre freire froofe i-free ier-oe ierror iffier iiooio ioffer ipero ipfire irereo oferre offire offrir ofpoor oooooo oopiri peepee peeper peerer peerie peerio peffer peiere peiper pepero pepper perere perier perire peroff peroor perore perper perree perrie pieper pierie pierre pierri pierro pifero piffer piopio pioppi piperi pipier pipipi pipiri pipper pippip piree pirrie pirrip poffer poipoi pooper poopie poopoo poorer popfor popoff popopo poporo popper poppop pppppp pre-op prefer preffe preier preiff preire preore priefe priere priero priffe priore priori prioro profer proffe profir profor profre proper propi- propir propre reefer reeffe reeper refeff refire refrei repier repipe repope repper repref reprie reroof riffer rififi ripier ripoff ripper roeier roeper roiffe roofer roofie roopee rooper roperi ropier