utcle tucle uctle cutle tcule ctule utlce tulce ultce lutce tluce ltuce uclte culte ulcte lucte clute lcute tclue ctlue tlcue ltcue cltue lctue utcel tucel uctel cutel tcuel ctuel utecl tuecl uetcl eutcl teucl etucl ucetl cuetl uectl euctl ceutl ecutl tceul cteul tecul etcul cetul ectul utlec tulec ultec lutec tluec ltuec utelc tuelc uetlc eutlc teulc etulc uletc luetc ueltc eultc leutc elutc tleuc lteuc teluc etluc letuc eltuc uclet culet ulcet lucet cluet lcuet ucelt cuelt ueclt euclt ceult ecult ulect luect uelct eulct leuct eluct cleut lceut celut eclut lecut elcut tcleu ctleu tlceu ltceu clteu lcteu tcelu ctelu teclu etclu cetlu ectlu tlecu ltecu telcu etlcu letcu eltcu cletu lcetu celtu ecltu lectu elctu
Note: these 'words' (valid or invalid) are all the permutations of the word utcle. These words are obtained by scrambling the letters in utcle.