pules uples plues lpues ulpes lupes puels upels peuls epuls uepls eupls pleus lpeus pelus eplus lepus elpus uleps lueps uelps eulps leups elups pulse uplse pluse lpuse ulpse lupse pusle upsle psule spule usple suple plsue lpsue pslue splue lspue slpue ulspe luspe uslpe sulpe lsupe slupe puesl upesl peusl epusl uepsl eupsl pusel upsel psuel spuel uspel supel pesul epsul pseul speul espul sepul uespl euspl usepl suepl esupl seupl plesu lpesu pelsu eplsu lepsu elpsu plseu lpseu psleu spleu lspeu slpeu peslu epslu pselu spelu esplu seplu lespu elspu lsepu slepu eslpu selpu ulesp luesp uelsp eulsp leusp elusp ulsep lusep uslep sulep lsuep sluep ueslp euslp uselp suelp esulp seulp lesup elsup lseup sleup eslup selup
Note: these 'words' (valid or invalid) are all the permutations of the word pules. These words are obtained by scrambling the letters in pules.