trlel rtlel tlrel ltrel rltel lrtel trell rtell terll etrll retll ertll tlerl lterl telrl etlrl letrl eltrl rletl lretl reltl erltl lertl elrtl trlle rtlle tlrle ltrle rltle lrtle trlle rtlle tlrle ltrle rltle lrtle tllre ltlre tllre ltlre lltre lltre rllte lrlte rllte lrlte llrte llrte trell rtell terll etrll retll ertll trlel rtlel tlrel ltrel rltel lrtel telrl etlrl tlerl lterl eltrl letrl reltl erltl rletl lretl elrtl lertl tlelr ltelr tellr etllr letlr eltlr tller ltler tller ltler llter llter tellr etllr tlelr ltelr eltlr letlr leltr elltr lletr lletr elltr leltr rlelt lrelt rellt erllt lerlt elrlt rllet lrlet rllet lrlet llret llret rellt erllt rlelt lrelt elrlt lerlt lelrt ellrt llert llert ellrt lelrt
Note: these 'words' (valid or invalid) are all the permutations of the word trlel. These words are obtained by scrambling the letters in trlel.