pyrex yprex pryex rpyex yrpex rypex pyerx yperx peyrx epyrx yeprx eyprx preyx rpeyx peryx epryx repyx erpyx yrepx ryepx yerpx eyrpx reypx erypx pyrxe yprxe pryxe rpyxe yrpxe rypxe pyxre ypxre pxyre xpyre yxpre xypre prxye rpxye pxrye xprye rxpye xrpye yrxpe ryxpe yxrpe xyrpe rxype xrype pyexr ypexr peyxr epyxr yepxr eypxr pyxer ypxer pxyer xpyer yxper xyper pexyr epxyr pxeyr xpeyr expyr xepyr yexpr eyxpr yxepr xyepr exypr xeypr prexy rpexy perxy eprxy repxy erpxy prxey rpxey pxrey xprey rxpey xrpey pexry epxry pxery xpery expry xepry rexpy erxpy rxepy xrepy exrpy xerpy yrexp ryexp yerxp eyrxp reyxp eryxp yrxep ryxep yxrep xyrep rxyep xryep yexrp eyxrp yxerp xyerp exyrp xeyrp rexyp erxyp rxeyp xreyp exryp xeryp
Note: these 'words' (valid or invalid) are all the permutations of the word pyrex. These words are obtained by scrambling the letters in pyrex.