aifun iafun afiun faiun ifaun fiaun aiufn iaufn auifn uaifn iuafn uiafn afuin fauin aufin uafin fuain ufain ifuan fiuan iufan uifan fuian ufian aifnu iafnu afinu fainu ifanu fianu ainfu ianfu anifu naifu inafu niafu afniu faniu anfiu nafiu fnaiu nfaiu ifnau finau infau nifau fniau nfiau aiunf iaunf auinf uainf iuanf uianf ainuf ianuf aniuf naiuf inauf niauf aunif uanif anuif nauif unaif nuaif iunaf uinaf inuaf niuaf uniaf nuiaf afuni fauni aufni uafni fuani ufani afnui fanui anfui nafui fnaui nfaui aunfi uanfi anufi naufi unafi nuafi funai ufnai fnuai nfuai unfai nufai ifuna fiuna iufna uifna fuina ufina ifnua finua infua nifua fniua nfiua iunfa uinfa inufa niufa unifa nuifa funia ufnia fnuia nfuia unfia nufia
Note: these 'words' (valid or invalid) are all the permutations of the word aifun. These words are obtained by scrambling the letters in aifun.