fiyer ifyer fyier yfier iyfer yifer fieyr ifeyr feiyr efiyr iefyr eifyr fyeir yfeir feyir efyir yefir eyfir iyefr yiefr ieyfr eiyfr yeifr eyifr fiyre ifyre fyire yfire iyfre yifre firye ifrye friye rfiye irfye rifye fyrie yfrie fryie rfyie yrfie ryfie iyrfe yirfe iryfe riyfe yrife ryife fiery ifery feiry efiry iefry eifry firey ifrey friey rfiey irfey rifey feriy efriy freiy rfeiy erfiy refiy ierfy eirfy irefy riefy erify reify fyeri yferi feyri efyri yefri eyfri fyrei yfrei fryei rfyei yrfei ryfei feryi efryi freyi rfeyi erfyi refyi yerfi eyrfi yrefi ryefi eryfi reyfi iyerf yierf ieyrf eiyrf yeirf eyirf iyref yiref iryef riyef yrief ryief ieryf eiryf ireyf rieyf eriyf reiyf yerif eyrif yreif ryeif eryif reyif
Note: these 'words' (valid or invalid) are all the permutations of the word fiyer. These words are obtained by scrambling the letters in fiyer.