Styx tSyx Sytx yStx tySx ytSx Stxy tSxy Sxty xSty txSy xtSy Syxt ySxt Sxyt xSyt yxSt xySt tyxS ytxS txyS xtyS yxtS xytS
Note: these 'words' (valid or invalid) are all the permutations of the word Styx. These words are obtained by scrambling the letters in Styx.