leets elets leets elets eelts eelts letes eltes ltees tlees etles teles letes eltes ltees tlees etles teles eetls eetls etels teels etels teels leest elest leest elest eelst eelst leset elset lseet sleet eslet selet leset elset lseet sleet eslet selet eeslt eeslt eselt seelt eselt seelt letse eltse ltese tlese etlse telse leste elste lsete slete eslte selte ltsee tlsee lstee sltee tslee stlee etsle tesle estle setle tsele stele letse eltse ltese tlese etlse telse leste elste lsete slete eslte selte ltsee tlsee lstee sltee tslee stlee etsle tesle estle setle tsele stele eetsl eetsl etesl teesl etesl teesl eestl eestl esetl seetl esetl seetl etsel tesel estel setel tseel steel etsel tesel estel setel tseel steel
Note: these 'words' (valid or invalid) are all the permutations of the word leets. These words are obtained by scrambling the letters in leets.