skry ksry srky rsky krsy rksy skyr ksyr sykr yskr kysr yksr sryk rsyk syrk ysrk rysk yrsk krys rkys kyrs ykrs ryks yrks
Note: these 'words' (valid or invalid) are all the permutations of the word skry. These words are obtained by scrambling the letters in skry.