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