yexes eyxes yxees xyees exyes xeyes yeexs eyexs yeexs eyexs eeyxs eeyxs yxees xyees yexes eyxes xeyes exyes exeys xeeys eexys eexys xeeys exeys yexse eyxse yxese xyese exyse xeyse yesxe eysxe ysexe syexe esyxe seyxe yxsee xysee ysxee syxee xsyee sxyee exsye xesye esxye sexye xseye sxeye yeesx eyesx yeesx eyesx eeysx eeysx yesex eysex yseex syeex esyex seyex yesex eysex yseex syeex esyex seyex eesyx eesyx eseyx seeyx eseyx seeyx yxese xyese yexse eyxse xeyse exyse yxsee xysee ysxee syxee xsyee sxyee yesxe eysxe ysexe syexe esyxe seyxe xesye exsye xseye sxeye esxye sexye exesy xeesy eexsy eexsy xeesy exesy exsey xesey esxey sexey xseey sxeey eesxy eesxy esexy seexy esexy seexy xesey exsey xseey sxeey esxey sexey
Note: these 'words' (valid or invalid) are all the permutations of the word yexes. These words are obtained by scrambling the letters in yexes.