frowl rfowl forwl ofrwl rofwl orfwl frwol rfwol fwrol wfrol rwfol wrfol fowrl ofwrl fworl wforl owfrl wofrl rowfl orwfl rwofl wrofl owrfl worfl frolw rfolw forlw ofrlw roflw orflw frlow rflow flrow lfrow rlfow lrfow folrw oflrw florw lforw olfrw lofrw rolfw orlfw rlofw lrofw olrfw lorfw frwlo rfwlo fwrlo wfrlo rwflo wrflo frlwo rflwo flrwo lfrwo rlfwo lrfwo fwlro wflro flwro lfwro wlfro lwfro rwlfo wrlfo rlwfo lrwfo wlrfo lwrfo fowlr ofwlr fwolr wfolr owflr woflr folwr oflwr flowr lfowr olfwr lofwr fwlor wflor flwor lfwor wlfor lwfor owlfr wolfr olwfr lowfr wlofr lwofr rowlf orwlf rwolf wrolf owrlf worlf rolwf orlwf rlowf lrowf olrwf lorwf rwlof wrlof rlwof lrwof wlrof lwrof owlrf wolrf olwrf lowrf wlorf lworf
Note: these 'words' (valid or invalid) are all the permutations of the word frowl. These words are obtained by scrambling the letters in frowl.