cheth hceth cehth echth hecth ehcth chteh hcteh ctheh tcheh htceh thceh cethh ecthh ctehh tcehh etchh techh hetch ehtch htech thech ethch tehch cheht hceht cehht echht hecht ehcht chhet hchet chhet hchet hhcet hhcet cehht echht cheht hceht ehcht hecht hehct ehhct hhect hhect ehhct hehct chthe hcthe cthhe tchhe htche thche chhte hchte chhte hchte hhcte hhcte cthhe tchhe chthe hcthe thche htche hthce thhce hhtce hhtce thhce hthce cethh ecthh ctehh tcehh etchh techh cehth echth cheth hceth ehcth hecth ctheh tcheh chteh hcteh thceh htceh ethch tehch ehtch hetch thech htech hethc ehthc htehc thehc ethhc tehhc hehtc ehhtc hhetc hhetc ehhtc hehtc hthec thhec hhtec hhtec thhec hthec ethhc tehhc ehthc hethc thehc htehc
Note: these 'words' (valid or invalid) are all the permutations of the word cheth. These words are obtained by scrambling the letters in cheth.