wilr iwlr wlir lwir ilwr liwr wirl iwrl wril rwil irwl riwl wlri lwri wrli rwli lrwi rlwi ilrw lirw irlw rilw lriw rliw
Note: these 'words' (valid or invalid) are all the permutations of the word wilr. These words are obtained by scrambling the letters in wilr.