gexp egxp gxep xgep exgp xegp gepx egpx gpex pgex epgx pegx gxpe xgpe gpxe pgxe xpge pxge expg xepg epxg pexg xpeg pxeg
Note: these 'words' (valid or invalid) are all the permutations of the word gexp. These words are obtained by scrambling the letters in gexp.