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