doorn odorn doorn odorn oodrn oodrn doron odron droon rdoon ordon rodon doron odron droon rdoon ordon rodon oordn oordn orodn roodn orodn roodn doonr odonr doonr odonr oodnr oodnr donor odnor dnoor ndoor ondor nodor donor odnor dnoor ndoor ondor nodor oondr oondr onodr noodr onodr noodr dorno odrno drono rdono ordno rodno donro odnro dnoro ndoro ondro nodro drnoo rdnoo dnroo ndroo rndoo nrdoo orndo rondo onrdo nordo rnodo nrodo dorno odrno drono rdono ordno rodno donro odnro dnoro ndoro ondro nodro drnoo rdnoo dnroo ndroo rndoo nrdoo orndo rondo onrdo nordo rnodo nrodo oornd oornd orond roond orond roond oonrd oonrd onord noord onord noord ornod ronod onrod norod rnood nrood ornod ronod onrod norod rnood nrood
Note: these 'words' (valid or invalid) are all the permutations of the word doorn. These words are obtained by scrambling the letters in doorn.