efoll feoll eofll oefll foell ofell eflol felol elfol lefol fleol lfeol eolfl oelfl elofl leofl olefl loefl folel oflel floel lfoel olfel lofel efoll feoll eofll oefll foell ofell eflol felol elfol lefol fleol lfeol eolfl oelfl elofl leofl olefl loefl folel oflel floel lfoel olfel lofel efllo fello elflo leflo flelo lfelo efllo fello elflo leflo flelo lfelo ellfo lelfo ellfo lelfo llefo llefo flleo lfleo flleo lfleo llfeo llfeo eollf oellf elolf leolf olelf loelf eollf oellf elolf leolf olelf loelf ellof lelof ellof lelof lleof lleof ollef lolef ollef lolef lloef lloef folle oflle flole lfole olfle lofle folle oflle flole lfole olfle lofle flloe lfloe flloe lfloe llfoe llfoe ollfe lolfe ollfe lolfe llofe llofe
Note: these 'words' (valid or invalid) are all the permutations of the word efoll. These words are obtained by scrambling the letters in efoll.