upsey pusey uspey supey psuey spuey upesy puesy uepsy eupsy peusy epusy usepy suepy uespy euspy seupy esupy pseuy speuy pesuy epsuy sepuy espuy upsye pusye uspye supye psuye spuye upyse puyse uypse yupse pyuse ypuse usype suype uyspe yuspe syupe ysupe psyue spyue pysue ypsue sypue yspue upeys pueys uepys eupys peuys epuys upyes puyes uypes yupes pyues ypues ueyps euyps uyeps yueps eyups yeups peyus epyus pyeus ypeus eypus yepus useyp sueyp uesyp eusyp seuyp esuyp usyep suyep uysep yusep syuep ysuep ueysp euysp uyesp yuesp eyusp yeusp seyup esyup syeup yseup eysup yesup pseyu speyu pesyu epsyu sepyu espyu psyeu spyeu pyseu ypseu sypeu yspeu peysu epysu pyesu ypesu eypsu yepsu seypu esypu syepu ysepu eyspu yespu
Note: these 'words' (valid or invalid) are all the permutations of the word upsey. These words are obtained by scrambling the letters in upsey.