heirs ehirs hiers ihers eihrs iehrs heris ehris hreis rheis erhis rehis hires ihres hries rhies irhes rihes eirhs ierhs erihs reihs irehs riehs heisr ehisr hiesr ihesr eihsr iehsr hesir ehsir hseir sheir eshir sehir hiser ihser hsier shier isher siher eishr ieshr esihr seihr isehr siehr hersi ehrsi hresi rhesi erhsi rehsi hesri ehsri hseri sheri eshri sehri hrsei rhsei hsrei shrei rshei srhei ershi reshi esrhi serhi rsehi srehi hirse ihrse hrise rhise irhse rihse hisre ihsre hsire shire ishre sihre hrsie rhsie hsrie shrie rshie srhie irshe rishe isrhe sirhe rsihe srihe eirsh iersh erish reish iresh riesh eisrh iesrh esirh seirh iserh sierh ersih resih esrih serih rseih sreih irseh riseh isreh sireh rsieh srieh
Note: these 'words' (valid or invalid) are all the permutations of the word heirs. These words are obtained by scrambling the letters in heirs.