piwh ipwh pwih wpih iwph wiph pihw iphw phiw hpiw ihpw hipw pwhi wphi phwi hpwi whpi hwpi iwhp wihp ihwp hiwp whip hwip
Note: these 'words' (valid or invalid) are all the permutations of the word piwh. These words are obtained by scrambling the letters in piwh.