droun rdoun dorun odrun rodun ordun druon rduon duron udron rudon urdon dourn odurn duorn udorn oudrn uodrn roudn orudn ruodn urodn ourdn uordn dronu rdonu dornu odrnu rodnu ordnu drnou rdnou dnrou ndrou rndou nrdou donru odnru dnoru ndoru ondru nodru rondu orndu rnodu nrodu onrdu nordu druno rduno durno udrno rudno urdno drnuo rdnuo dnruo ndruo rnduo nrduo dunro udnro dnuro nduro undro nudro rundo urndo rnudo nrudo unrdo nurdo dounr odunr duonr udonr oudnr uodnr donur odnur dnour ndour ondur nodur dunor udnor dnuor nduor undor nudor oundr uondr onudr noudr unodr nuodr round orund ruond urond ournd uornd ronud ornud rnoud nroud onrud norud runod urnod rnuod nruod unrod nurod ounrd uonrd onurd nourd unord nuord
Note: these 'words' (valid or invalid) are all the permutations of the word droun. These words are obtained by scrambling the letters in droun.