unfit nufit ufnit funit nfuit fnuit unift nuift uinft iunft niuft inuft ufint fuint uifnt iufnt fiunt ifunt nfiut fniut nifut infut finut ifnut unfti nufti ufnti funti nfuti fnuti untfi nutfi utnfi tunfi ntufi tnufi uftni futni utfni tufni ftuni tfuni nftui fntui ntfui tnfui ftnui tfnui unitf nuitf uintf iuntf niutf inutf untif nutif utnif tunif ntuif tnuif uitnf iutnf utinf tuinf itunf tiunf nituf intuf ntiuf tniuf itnuf tinuf ufitn fuitn uiftn iuftn fiutn ifutn uftin futin utfin tufin ftuin tfuin uitfn iutfn utifn tuifn itufn tiufn fitun iftun ftiun tfiun itfun tifun nfitu fnitu niftu inftu fintu ifntu nftiu fntiu ntfiu tnfiu ftniu tfniu nitfu intfu ntifu tnifu itnfu tinfu fitnu iftnu ftinu tfinu itfnu tifnu
Note: these 'words' (valid or invalid) are all the permutations of the word unfit. These words are obtained by scrambling the letters in unfit.