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