dunsh udnsh dnush ndush undsh nudsh dusnh udsnh dsunh sdunh usdnh sudnh dnsuh ndsuh dsnuh sdnuh nsduh snduh unsdh nusdh usndh sundh nsudh snudh dunhs udnhs dnuhs nduhs undhs nudhs duhns udhns dhuns hduns uhdns hudns dnhus ndhus dhnus hdnus nhdus hndus unhds nuhds uhnds hunds nhuds hnuds dushn udshn dsuhn sduhn usdhn sudhn duhsn udhsn dhusn hdusn uhdsn hudsn dshun sdhun dhsun hdsun shdun hsdun ushdn suhdn uhsdn husdn shudn hsudn dnshu ndshu dsnhu sdnhu nsdhu sndhu dnhsu ndhsu dhnsu hdnsu nhdsu hndsu dshnu sdhnu dhsnu hdsnu shdnu hsdnu nshdu snhdu nhsdu hnsdu shndu hsndu unshd nushd usnhd sunhd nsuhd snuhd unhsd nuhsd uhnsd hunsd nhusd hnusd ushnd suhnd uhsnd husnd shund hsund nshud snhud nhsud hnsud shnud hsnud
Note: these 'words' (valid or invalid) are all the permutations of the word dunsh. These words are obtained by scrambling the letters in dunsh.