yoofs oyofs yoofs oyofs ooyfs ooyfs yofos oyfos yfoos fyoos ofyos foyos yofos oyfos yfoos fyoos ofyos foyos oofys oofys ofoys fooys ofoys fooys yoosf oyosf yoosf oyosf ooysf ooysf yosof oysof ysoof syoof osyof soyof yosof oysof ysoof syoof osyof soyof oosyf oosyf osoyf sooyf osoyf sooyf yofso oyfso yfoso fyoso ofyso foyso yosfo oysfo ysofo syofo osyfo soyfo yfsoo fysoo ysfoo syfoo fsyoo sfyoo ofsyo fosyo osfyo sofyo fsoyo sfoyo yofso oyfso yfoso fyoso ofyso foyso yosfo oysfo ysofo syofo osyfo soyfo yfsoo fysoo ysfoo syfoo fsyoo sfyoo ofsyo fosyo osfyo sofyo fsoyo sfoyo oofsy oofsy ofosy foosy ofosy foosy oosfy oosfy osofy soofy osofy soofy ofsoy fosoy osfoy sofoy fsooy sfooy ofsoy fosoy osfoy sofoy fsooy sfooy
Note: these 'words' (valid or invalid) are all the permutations of the word yoofs. These words are obtained by scrambling the letters in yoofs.