quey uqey qeuy equy ueqy euqy quye uqye qyue yque uyqe yuqe qeyu eqyu qyeu yqeu eyqu yequ ueyq euyq uyeq yueq eyuq yeuq
Note: these 'words' (valid or invalid) are all the permutations of the word quey. These words are obtained by scrambling the letters in quey.