alfil lafil aflil falil lfail flail alifl laifl ailfl ialfl liafl ilafl afill faill aifll iafll fiall ifall lfial flial lifal ilfal filal iflal alfli lafli aflli falli lfali flali allfi lalfi allfi lalfi llafi llafi aflli falli alfli lafli flali lfali lflai fllai llfai llfai fllai lflai alilf lailf aillf iallf lialf ilalf allif lalif allif lalif llaif llaif aillf iallf alilf lailf ilalf lialf lilaf illaf lliaf lliaf illaf lilaf afill faill aifll iafll fiall ifall aflil falil alfil lafil flail lfail ailfl ialfl alifl laifl ilafl liafl filal iflal flial lfial ilfal lifal lfila flila lifla ilfla filla iflla lflia fllia llfia llfia fllia lflia lilfa illfa llifa llifa illfa lilfa filla iflla flila lfila ilfla lifla
Note: these 'words' (valid or invalid) are all the permutations of the word alfil. These words are obtained by scrambling the letters in alfil.