Durer uDrer Druer rDuer urDer ruDer Duerr uDerr Deurr eDurr ueDrr euDrr Dreur rDeur Derur eDrur reDur erDur ureDr rueDr uerDr eurDr reuDr eruDr Durre uDrre Drure rDure urDre ruDre Durre uDrre Drure rDure urDre ruDre Drrue rDrue Drrue rDrue rrDue rrDue urrDe rurDe urrDe rurDe rruDe rruDe Duerr uDerr Deurr eDurr ueDrr euDrr Durer uDrer Druer rDuer urDer ruDer Derur eDrur Dreur rDeur erDur reDur uerDr eurDr ureDr rueDr eruDr reuDr Dreru rDeru Derru eDrru reDru erDru Drreu rDreu Drreu rDreu rrDeu rrDeu Derru eDrru Dreru rDeru erDru reDru rerDu errDu rreDu rreDu errDu rerDu urerD ruerD uerrD eurrD reurD erurD urreD rureD urreD rureD rrueD rrueD uerrD eurrD urerD ruerD erurD reurD reruD erruD rreuD rreuD erruD reruD
Note: these 'words' (valid or invalid) are all the permutations of the word Durer. These words are obtained by scrambling the letters in Durer.