ishes sihes ihses hises shies hsies isehs siehs ieshs eishs seihs esihs ihess hiess iehss eihss heiss ehiss sheis hseis sehis eshis hesis ehsis ishse sihse ihsse hisse shise hsise isshe sishe isshe sishe ssihe ssihe ihsse hisse ishse sihse hsise shise shsie hssie sshie sshie hssie shsie isesh siesh iessh eissh seish esish isseh siseh isseh siseh ssieh ssieh iessh eissh isesh siesh esish seish sesih essih sseih sseih essih sesih ihess hiess iehss eihss heiss ehiss ihses hises ishes sihes hsies shies ieshs eishs isehs siehs esihs seihs hesis ehsis hseis sheis eshis sehis shesi hsesi sehsi eshsi hessi ehssi shsei hssei sshei sshei hssei shsei seshi esshi ssehi ssehi esshi seshi hessi ehssi hsesi shesi eshsi sehsi
Note: these 'words' (valid or invalid) are all the permutations of the word ishes. These words are obtained by scrambling the letters in ishes.