poyou opyou pyoou ypoou oypou yopou pooyu opoyu pooyu opoyu oopyu oopyu pyoou ypoou poyou opyou yopou oypou oyopu yoopu ooypu ooypu yoopu oyopu poyuo opyuo pyouo ypouo oypuo yopuo pouyo opuyo puoyo upoyo oupyo uopyo pyuoo ypuoo puyoo upyoo yupoo uypoo oyupo youpo ouypo uoypo yuopo uyopo poouy opouy poouy opouy oopuy oopuy pouoy opuoy puooy upooy oupoy uopoy pouoy opuoy puooy upooy oupoy uopoy ooupy ooupy ouopy uoopy ouopy uoopy pyouo ypouo poyuo opyuo yopuo oypuo pyuoo ypuoo puyoo upyoo yupoo uypoo pouyo opuyo puoyo upoyo oupyo uopyo youpo oyupo yuopo uyopo ouypo uoypo oyoup yooup ooyup ooyup yooup oyoup oyuop youop ouyop uoyop yuoop uyoop oouyp oouyp ouoyp uooyp ouoyp uooyp youop oyuop yuoop uyoop ouyop uoyop
Note: these 'words' (valid or invalid) are all the permutations of the word poyou. These words are obtained by scrambling the letters in poyou.