tache atche tcahe ctahe acthe cathe tahce athce thace htace ahtce hatce tchae cthae thcae htcae chtae hctae achte cahte ahcte hacte chate hcate taceh atceh tcaeh ctaeh acteh cateh taech atech teach etach aetch eatch tceah cteah tecah etcah cetah ectah aceth caeth aecth eacth ceath ecath tahec athec thaec htaec ahtec hatec taehc atehc teahc etahc aethc eathc theac hteac tehac ethac hetac ehtac ahetc haetc aehtc eahtc heatc ehatc tchea cthea thcea htcea chtea hctea tceha cteha techa etcha cetha ectha theca hteca tehca ethca hetca ehtca cheta hceta cehta echta hecta ehcta achet cahet ahcet hacet chaet hcaet aceht caeht aecht eacht ceaht ecaht ahect haect aehct eahct heact ehact cheat hceat cehat echat hecat ehcat
Note: these 'words' (valid or invalid) are all the permutations of the word tache. These words are obtained by scrambling the letters in tache.