docq odcq dcoq cdoq ocdq codq doqc odqc dqoc qdoc oqdc qodc dcqo cdqo dqco qdco cqdo qcdo ocqd coqd oqcd qocd cqod qcod
Note: these 'words' (valid or invalid) are all the permutations of the word docq. These words are obtained by scrambling the letters in docq.