docht odcht dcoht cdoht ocdht codht dohct odhct dhoct hdoct ohdct hodct dchot cdhot dhcot hdcot chdot hcdot ochdt cohdt ohcdt hocdt chodt hcodt docth odcth dcoth cdoth ocdth codth dotch odtch dtoch tdoch otdch todch dctoh cdtoh dtcoh tdcoh ctdoh tcdoh octdh cotdh otcdh tocdh ctodh tcodh dohtc odhtc dhotc hdotc ohdtc hodtc dothc odthc dtohc tdohc otdhc todhc dhtoc hdtoc dthoc tdhoc htdoc thdoc ohtdc hotdc othdc tohdc htodc thodc dchto cdhto dhcto hdcto chdto hcdto dctho cdtho dtcho tdcho ctdho tcdho dhtco hdtco dthco tdhco htdco thdco chtdo hctdo cthdo tchdo htcdo thcdo ochtd cohtd ohctd hoctd chotd hcotd octhd cothd otchd tochd ctohd tcohd ohtcd hotcd othcd tohcd htocd thocd chtod hctod cthod tchod htcod thcod
Note: these 'words' (valid or invalid) are all the permutations of the word docht. These words are obtained by scrambling the letters in docht.