kheth hketh kehth ekhth hekth ehkth khteh hkteh ktheh tkheh htkeh thkeh kethh ekthh ktehh tkehh etkhh tekhh hetkh ehtkh htekh thekh ethkh tehkh kheht hkeht kehht ekhht hekht ehkht khhet hkhet khhet hkhet hhket hhket kehht ekhht kheht hkeht ehkht hekht hehkt ehhkt hhekt hhekt ehhkt hehkt khthe hkthe kthhe tkhhe htkhe thkhe khhte hkhte khhte hkhte hhkte hhkte kthhe tkhhe khthe hkthe thkhe htkhe hthke thhke hhtke hhtke thhke hthke kethh ekthh ktehh tkehh etkhh tekhh kehth ekhth kheth hketh ehkth hekth ktheh tkheh khteh hkteh thkeh htkeh ethkh tehkh ehtkh hetkh thekh htekh hethk ehthk htehk thehk ethhk tehhk hehtk ehhtk hhetk hhetk ehhtk hehtk hthek thhek hhtek hhtek thhek hthek ethhk tehhk ehthk hethk thehk htehk
Note: these 'words' (valid or invalid) are all the permutations of the word kheth. These words are obtained by scrambling the letters in kheth.