cruor rcuor curor ucror rucor urcor crour rcour corur ocrur rocur orcur cuorr ucorr courr ocurr uocrr oucrr ruocr urocr roucr orucr uorcr ourcr cruro rcuro curro ucrro rucro urcro crruo rcruo crruo rcruo rrcuo rrcuo curro ucrro cruro rcuro urcro rucro rurco urrco rruco rruco urrco rurco croru rcoru corru ocrru rocru orcru crrou rcrou crrou rcrou rrcou rrcou corru ocrru croru rcoru orcru rocru rorcu orrcu rrocu rrocu orrcu rorcu cuorr ucorr courr ocurr uocrr oucrr curor ucror cruor rcuor urcor rucor corur ocrur crour rcour orcur rocur uorcr ourcr urocr ruocr orucr roucr ruorc urorc rourc orurc uorrc ourrc ruroc urroc rruoc rruoc urroc ruroc roruc orruc rrouc rrouc orruc roruc uorrc ourrc urorc ruorc orurc rourc
Note: these 'words' (valid or invalid) are all the permutations of the word cruor. These words are obtained by scrambling the letters in cruor.