firry ifrry friry rfiry irfry rifry firry ifrry friry rfiry irfry rifry frriy rfriy frriy rfriy rrfiy rrfiy irrfy rirfy irrfy rirfy rrify rrify firyr ifryr friyr rfiyr irfyr rifyr fiyrr ifyrr fyirr yfirr iyfrr yifrr fryir rfyir fyrir yfrir ryfir yrfir iryfr riyfr iyrfr yirfr ryifr yrifr firyr ifryr friyr rfiyr irfyr rifyr fiyrr ifyrr fyirr yfirr iyfrr yifrr fryir rfyir fyrir yfrir ryfir yrfir iryfr riyfr iyrfr yirfr ryifr yrifr frryi rfryi frryi rfryi rrfyi rrfyi fryri rfyri fyrri yfrri ryfri yrfri fryri rfyri fyrri yfrri ryfri yrfri rryfi rryfi ryrfi yrrfi ryrfi yrrfi irryf riryf irryf riryf rriyf rriyf iryrf riyrf iyrrf yirrf ryirf yrirf iryrf riyrf iyrrf yirrf ryirf yrirf rryif rryif ryrif yrrif ryrif yrrif
Note: these 'words' (valid or invalid) are all the permutations of the word firry. These words are obtained by scrambling the letters in firry.