dully udlly dluly lduly uldly ludly dully udlly dluly lduly uldly ludly dlluy ldluy dlluy ldluy llduy llduy ulldy luldy ulldy luldy lludy lludy dulyl udlyl dluyl lduyl uldyl ludyl duyll udyll dyull ydull uydll yudll dlyul ldyul dylul ydlul lydul yldul ulydl luydl uyldl yuldl lyudl yludl dulyl udlyl dluyl lduyl uldyl ludyl duyll udyll dyull ydull uydll yudll dlyul ldyul dylul ydlul lydul yldul ulydl luydl uyldl yuldl lyudl yludl dllyu ldlyu dllyu ldlyu lldyu lldyu dlylu ldylu dyllu ydllu lydlu yldlu dlylu ldylu dyllu ydllu lydlu yldlu llydu llydu lyldu ylldu lyldu ylldu ullyd lulyd ullyd lulyd lluyd lluyd ulyld luyld uylld yulld lyuld yluld ulyld luyld uylld yulld lyuld yluld llyud llyud lylud yllud lylud yllud
Note: these 'words' (valid or invalid) are all the permutations of the word dully. These words are obtained by scrambling the letters in dully.