bluer lbuer buler ubler luber ulber bleur lbeur belur eblur lebur elbur buelr ubelr beulr ebulr ueblr eublr luebr ulebr leubr elubr uelbr eulbr blure lbure bulre ublre lubre ulbre blrue lbrue brlue rblue lrbue rlbue burle ubrle brule rbule urble ruble lurbe ulrbe lrube rlube urlbe rulbe bleru lberu belru eblru lebru elbru blreu lbreu brleu rbleu lrbeu rlbeu berlu ebrlu brelu rbelu erblu reblu lerbu elrbu lrebu rlebu erlbu relbu buerl uberl beurl eburl uebrl eubrl burel ubrel bruel rbuel urbel rubel berul ebrul breul rbeul erbul rebul uerbl eurbl urebl ruebl erubl reubl luerb ulerb leurb elurb uelrb eulrb lureb ulreb lrueb rlueb urleb ruleb lerub elrub lreub rleub erlub relub uerlb eurlb urelb ruelb erulb reulb
Note: these 'words' (valid or invalid) are all the permutations of the word bluer. These words are obtained by scrambling the letters in bluer.