jock ojck jcok cjok ocjk cojk jokc ojkc jkoc kjoc okjc kojc jcko cjko jkco kjco ckjo kcjo ockj cokj okcj kocj ckoj kcoj
Note: these 'words' (valid or invalid) are all the permutations of the word jock. These words are obtained by scrambling the letters in jock.