yauds ayuds yuads uyads auyds uayds yadus aydus ydaus dyaus adyus dayus yudas uydas yduas dyuas udyas duyas audys uadys aduys dauys udays duays yausd ayusd yuasd uyasd auysd uaysd yasud aysud ysaud syaud asyud sayud yusad uysad ysuad syuad usyad suyad ausyd uasyd asuyd sauyd usayd suayd yadsu aydsu ydasu dyasu adysu daysu yasdu aysdu ysadu syadu asydu saydu ydsau dysau ysdau sydau dsyau sdyau adsyu dasyu asdyu sadyu dsayu sdayu yudsa uydsa ydusa dyusa udysa duysa yusda uysda ysuda syuda usyda suyda ydsua dysua ysdua sydua dsyua sdyua udsya dusya usdya sudya dsuya sduya audsy uadsy adusy dausy udasy duasy ausdy uasdy asudy saudy usady suady adsuy dasuy asduy saduy dsauy sdauy udsay dusay usday suday dsuay sduay
Note: these 'words' (valid or invalid) are all the permutations of the word yauds. These words are obtained by scrambling the letters in yauds.