furol ufrol fruol rfuol urfol rufol fuorl uforl fourl ofurl uofrl oufrl froul rfoul forul ofrul roful orful urofl ruofl uorfl ourfl roufl orufl furlo ufrlo frulo rfulo urflo ruflo fulro uflro fluro lfuro ulfro lufro frluo rfluo flruo lfruo rlfuo lrfuo urlfo rulfo ulrfo lurfo rlufo lrufo fuolr ufolr foulr ofulr uoflr ouflr fulor uflor fluor lfuor ulfor lufor folur oflur flour lfour olfur lofur uolfr oulfr ulofr luofr olufr loufr frolu rfolu forlu ofrlu roflu orflu frlou rflou flrou lfrou rlfou lrfou folru oflru floru lforu olfru lofru rolfu orlfu rlofu lrofu olrfu lorfu urolf ruolf uorlf ourlf roulf orulf urlof rulof ulrof lurof rluof lruof uolrf oulrf ulorf luorf olurf lourf roluf orluf rlouf lrouf olruf loruf
Note: these 'words' (valid or invalid) are all the permutations of the word furol. These words are obtained by scrambling the letters in furol.