lirer ilrer lrier rlier irler riler lierr ilerr leirr elirr ielrr eilrr lreir rleir lerir elrir relir erlir irelr rielr ierlr eirlr reilr erilr lirre ilrre lrire rlire irlre rilre lirre ilrre lrire rlire irlre rilre lrrie rlrie lrrie rlrie rrlie rrlie irrle rirle irrle rirle rrile rrile lierr ilerr leirr elirr ielrr eilrr lirer ilrer lrier rlier irler riler lerir elrir lreir rleir erlir relir ierlr eirlr irelr rielr erilr reilr lreri rleri lerri elrri relri erlri lrrei rlrei lrrei rlrei rrlei rrlei lerri elrri lreri rleri erlri relri rerli errli rreli rreli errli rerli irerl rierl ierrl eirrl reirl erirl irrel rirel irrel rirel rriel rriel ierrl eirrl irerl rierl erirl reirl reril erril rreil rreil erril reril
Note: these 'words' (valid or invalid) are all the permutations of the word lirer. These words are obtained by scrambling the letters in lirer.