khuds hkuds kuhds ukhds hukds uhkds khdus hkdus kdhus dkhus hdkus dhkus kudhs ukdhs kduhs dkuhs udkhs dukhs hudks uhdks hduks dhuks udhks duhks khusd hkusd kuhsd ukhsd huksd uhksd khsud hksud kshud skhud hskud shkud kushd ukshd ksuhd skuhd uskhd sukhd huskd uhskd hsukd shukd ushkd suhkd khdsu hkdsu kdhsu dkhsu hdksu dhksu khsdu hksdu kshdu skhdu hskdu shkdu kdshu dkshu ksdhu skdhu dskhu sdkhu hdsku dhsku hsdku shdku dshku sdhku kudsh ukdsh kdush dkush udksh duksh kusdh uksdh ksudh skudh uskdh sukdh kdsuh dksuh ksduh skduh dskuh sdkuh udskh duskh usdkh sudkh dsukh sdukh hudsk uhdsk hdusk dhusk udhsk duhsk husdk uhsdk hsudk shudk ushdk suhdk hdsuk dhsuk hsduk shduk dshuk sdhuk udshk dushk usdhk sudhk dsuhk sduhk
Note: these 'words' (valid or invalid) are all the permutations of the word khuds. These words are obtained by scrambling the letters in khuds.