nurle unrle nrule rnule urnle runle nulre unlre nlure lnure ulnre lunre nrlue rnlue nlrue lnrue rlnue lrnue urlne rulne ulrne lurne rlune lrune nurel unrel nruel rnuel urnel runel nuerl unerl neurl enurl uenrl eunrl nreul rneul nerul enrul renul ernul urenl ruenl uernl eurnl reunl erunl nuler unler nluer lnuer ulner luner nuelr unelr neulr enulr uenlr eunlr nleur lneur nelur enlur lenur elnur ulenr luenr uelnr eulnr leunr elunr nrleu rnleu nlreu lnreu rlneu lrneu nrelu rnelu nerlu enrlu renlu ernlu nleru lneru nelru enlru lenru elnru rlenu lrenu relnu erlnu lernu elrnu urlen rulen ulren luren rluen lruen ureln rueln uerln eurln reuln eruln ulern luern uelrn eulrn leurn elurn rleun lreun relun erlun lerun elrun
Note: these 'words' (valid or invalid) are all the permutations of the word nurle. These words are obtained by scrambling the letters in nurle.