ibler biler ilber liber blier lbier ibelr bielr ieblr eiblr beilr ebilr ilebr liebr ielbr eilbr leibr elibr bleir lbeir belir eblir lebir elbir iblre bilre ilbre libre blire lbire ibrle birle irble rible brile rbile ilrbe lirbe irlbe rilbe lribe rlibe blrie lbrie brlie rblie lrbie rlbie iberl bierl iebrl eibrl beirl ebirl ibrel birel irbel ribel briel rbiel ierbl eirbl irebl riebl eribl reibl beril ebril breil rbeil erbil rebil ilerb lierb ielrb eilrb leirb elirb ilreb lireb irleb rileb lrieb rlieb ierlb eirlb irelb rielb erilb reilb lerib elrib lreib rleib erlib relib bleri lberi belri eblri lebri elbri blrei lbrei brlei rblei lrbei rlbei berli ebrli breli rbeli erbli rebli lerbi elrbi lrebi rlebi erlbi relbi
Note: these 'words' (valid or invalid) are all the permutations of the word ibler. These words are obtained by scrambling the letters in ibler.