finis ifnis fniis nfiis infis nifis fiins ifins fiins ifins iifns iifns fniis nfiis finis ifnis nifis infis inifs niifs iinfs iinfs niifs inifs finsi ifnsi fnisi nfisi infsi nifsi fisni ifsni fsini sfini isfni sifni fnsii nfsii fsnii sfnii nsfii snfii insfi nisfi isnfi sinfi nsifi snifi fiisn ifisn fiisn ifisn iifsn iifsn fisin ifsin fsiin sfiin isfin sifin fisin ifsin fsiin sfiin isfin sifin iisfn iisfn isifn siifn isifn siifn fnisi nfisi finsi ifnsi nifsi infsi fnsii nfsii fsnii sfnii nsfii snfii fisni ifsni fsini sfini isfni sifni nisfi insfi nsifi snifi isnfi sinfi inisf niisf iinsf iinsf niisf inisf insif nisif isnif sinif nsiif sniif iisnf iisnf isinf siinf isinf siinf nisif insif nsiif sniif isnif sinif
Note: these 'words' (valid or invalid) are all the permutations of the word finis. These words are obtained by scrambling the letters in finis.