derry edrry drery rdery erdry redry derry edrry drery rdery erdry redry drrey rdrey drrey rdrey rrdey rrdey errdy rerdy errdy rerdy rredy rredy deryr edryr dreyr rdeyr erdyr redyr deyrr edyrr dyerr yderr eydrr yedrr dryer rdyer dyrer ydrer ryder yrder erydr reydr eyrdr yerdr ryedr yredr deryr edryr dreyr rdeyr erdyr redyr deyrr edyrr dyerr yderr eydrr yedrr dryer rdyer dyrer ydrer ryder yrder erydr reydr eyrdr yerdr ryedr yredr drrye rdrye drrye rdrye rrdye rrdye dryre rdyre dyrre ydrre rydre yrdre dryre rdyre dyrre ydrre rydre yrdre rryde rryde ryrde yrrde ryrde yrrde erryd reryd erryd reryd rreyd rreyd eryrd reyrd eyrrd yerrd ryerd yrerd eryrd reyrd eyrrd yerrd ryerd yrerd rryed rryed ryred yrred ryred yrred
Note: these 'words' (valid or invalid) are all the permutations of the word derry. These words are obtained by scrambling the letters in derry.