perky eprky preky rpeky erpky repky pekry epkry pkery kpery ekpry kepry prkey rpkey pkrey kprey rkpey krpey erkpy rekpy ekrpy kerpy rkepy krepy peryk epryk preyk rpeyk erpyk repyk peyrk epyrk pyerk yperk eyprk yeprk pryek rpyek pyrek yprek rypek yrpek erypk reypk eyrpk yerpk ryepk yrepk pekyr epkyr pkeyr kpeyr ekpyr kepyr peykr epykr pyekr ypekr eypkr yepkr pkyer kpyer pyker ypker kyper ykper ekypr keypr eykpr yekpr kyepr ykepr prkye rpkye pkrye kprye rkpye krpye pryke rpyke pyrke yprke rypke yrpke pkyre kpyre pykre ypkre kypre ykpre rkype krype rykpe yrkpe kyrpe ykrpe erkyp rekyp ekryp keryp rkeyp kreyp erykp reykp eyrkp yerkp ryekp yrekp ekyrp keyrp eykrp yekrp kyerp ykerp rkyep kryep rykep yrkep kyrep ykrep
Note: these 'words' (valid or invalid) are all the permutations of the word perky. These words are obtained by scrambling the letters in perky.