fillo ifllo flilo lfilo ilflo liflo fillo ifllo flilo lfilo ilflo liflo fllio lflio fllio lflio llfio llfio illfo lilfo illfo lilfo llifo llifo filol iflol fliol lfiol ilfol lifol fioll ifoll foill ofill iofll oifll floil lfoil folil oflil lofil olfil ilofl liofl iolfl oilfl loifl olifl filol iflol fliol lfiol ilfol lifol fioll ifoll foill ofill iofll oifll floil lfoil folil oflil lofil olfil ilofl liofl iolfl oilfl loifl olifl flloi lfloi flloi lfloi llfoi llfoi floli lfoli folli oflli lofli olfli floli lfoli folli oflli lofli olfli llofi llofi lolfi ollfi lolfi ollfi illof lilof illof lilof lliof lliof ilolf liolf iollf oillf loilf olilf ilolf liolf iollf oillf loilf olilf lloif lloif lolif ollif lolif ollif
Note: these 'words' (valid or invalid) are all the permutations of the word fillo. These words are obtained by scrambling the letters in fillo.