cleet lceet celet eclet lecet elcet cleet lceet celet eclet lecet elcet ceelt ecelt ceelt ecelt eeclt eeclt leect elect leect elect eelct eelct clete lcete celte eclte lecte elcte cltee lctee ctlee tclee ltcee tlcee cetle ectle ctele tcele etcle tecle letce eltce ltece tlece etlce telce clete lcete celte eclte lecte elcte cltee lctee ctlee tclee ltcee tlcee cetle ectle ctele tcele etcle tecle letce eltce ltece tlece etlce telce ceetl ecetl ceetl ecetl eectl eectl cetel ectel cteel tceel etcel tecel cetel ectel cteel tceel etcel tecel eetcl eetcl etecl teecl etecl teecl leetc eletc leetc eletc eeltc eeltc letec eltec lteec tleec etlec telec letec eltec lteec tleec etlec telec eetlc eetlc etelc teelc etelc teelc
Note: these 'words' (valid or invalid) are all the permutations of the word cleet. These words are obtained by scrambling the letters in cleet.