rexes erxes rxees xrees exres xeres reexs erexs reexs erexs eerxs eerxs rxees xrees rexes erxes xeres exres exers xeers eexrs eexrs xeers exers rexse erxse rxese xrese exrse xerse resxe ersxe rsexe srexe esrxe serxe rxsee xrsee rsxee srxee xsree sxree exsre xesre esxre sexre xsere sxere reesx eresx reesx eresx eersx eersx resex ersex rseex sreex esrex serex resex ersex rseex sreex esrex serex eesrx eesrx eserx seerx eserx seerx rxese xrese rexse erxse xerse exrse rxsee xrsee rsxee srxee xsree sxree resxe ersxe rsexe srexe esrxe serxe xesre exsre xsere sxere esxre sexre exesr xeesr eexsr eexsr xeesr exesr exser xeser esxer sexer xseer sxeer eesxr eesxr esexr seexr esexr seexr xeser exser xseer sxeer esxer sexer
Note: these 'words' (valid or invalid) are all the permutations of the word rexes. These words are obtained by scrambling the letters in rexes.