annul nanul annul nanul nnaul nnaul anunl naunl aunnl uannl nuanl unanl anunl naunl aunnl uannl nuanl unanl nnual nnual nunal unnal nunal unnal annlu nanlu annlu nanlu nnalu nnalu anlnu nalnu alnnu lannu nlanu lnanu anlnu nalnu alnnu lannu nlanu lnanu nnlau nnlau nlnau lnnau nlnau lnnau anuln nauln aunln uanln nualn unaln anlun nalun alnun lanun nlaun lnaun aulnn ualnn alunn launn ulann luann nulan unlan nluan lnuan ulnan lunan anuln nauln aunln uanln nualn unaln anlun nalun alnun lanun nlaun lnaun aulnn ualnn alunn launn ulann luann nulan unlan nluan lnuan ulnan lunan nnula nnula nunla unnla nunla unnla nnlua nnlua nlnua lnnua nlnua lnnua nulna unlna nluna lnuna ulnna lunna nulna unlna nluna lnuna ulnna lunna
Note: these 'words' (valid or invalid) are all the permutations of the word annul. These words are obtained by scrambling the letters in annul.