knurr nkurr kunrr uknrr nukrr unkrr knrur nkrur krnur rknur nrkur rnkur kurnr ukrnr krunr rkunr urknr ruknr nurkr unrkr nrukr rnukr urnkr runkr knurr nkurr kunrr uknrr nukrr unkrr knrur nkrur krnur rknur nrkur rnkur kurnr ukrnr krunr rkunr urknr ruknr nurkr unrkr nrukr rnukr urnkr runkr knrru nkrru krnru rknru nrkru rnkru knrru nkrru krnru rknru nrkru rnkru krrnu rkrnu krrnu rkrnu rrknu rrknu nrrku rnrku nrrku rnrku rrnku rrnku kurrn ukrrn krurn rkurn urkrn rukrn kurrn ukrrn krurn rkurn urkrn rukrn krrun rkrun krrun rkrun rrkun rrkun urrkn rurkn urrkn rurkn rrukn rrukn nurrk unrrk nrurk rnurk urnrk runrk nurrk unrrk nrurk rnurk urnrk runrk nrruk rnruk nrruk rnruk rrnuk rrnuk urrnk rurnk urrnk rurnk rrunk rrunk
Note: these 'words' (valid or invalid) are all the permutations of the word knurr. These words are obtained by scrambling the letters in knurr.