qeud equd qued uqed euqd ueqd qedu eqdu qdeu dqeu edqu dequ qude uqde qdue dque udqe duqe eudq uedq eduq deuq udeq dueq
Note: these 'words' (valid or invalid) are all the permutations of the word qeud. These words are obtained by scrambling the letters in qeud.