flier lfier filer ifler lifer ilfer fleir lfeir felir eflir lefir elfir fielr ifelr feilr efilr ieflr eiflr liefr ilefr leifr elifr ielfr eilfr flire lfire filre iflre lifre ilfre flrie lfrie frlie rflie lrfie rlfie firle ifrle frile rfile irfle rifle lirfe ilrfe lrife rlife irlfe rilfe fleri lferi felri eflri lefri elfri flrei lfrei frlei rflei lrfei rlfei ferli efrli freli rfeli erfli refli lerfi elrfi lrefi rlefi erlfi relfi fierl iferl feirl efirl iefrl eifrl firel ifrel friel rfiel irfel rifel feril efril freil rfeil erfil refil ierfl eirfl irefl riefl erifl reifl lierf ilerf leirf elirf ielrf eilrf liref ilref lrief rlief irlef rilef lerif elrif lreif rleif erlif relif ierlf eirlf irelf rielf erilf reilf
Note: these 'words' (valid or invalid) are all the permutations of the word flier. These words are obtained by scrambling the letters in flier.