quei uqei qeui equi ueqi euqi quie uqie qiue ique uiqe iuqe qeiu eqiu qieu iqeu eiqu iequ ueiq euiq uieq iueq eiuq ieuq
Note: these 'words' (valid or invalid) are all the permutations of the word quei. These words are obtained by scrambling the letters in quei.