leats elats laets alets ealts aelts letas eltas lteas tleas etlas telas lates altes ltaes tlaes atles tales eatls aetls etals teals atels taels least elast laest alest ealst aelst lesat elsat lseat sleat eslat selat laset alset lsaet slaet aslet salet easlt aeslt esalt sealt aselt saelt letsa eltsa ltesa tlesa etlsa telsa lesta elsta lseta sleta eslta selta ltsea tlsea lstea sltea tslea stlea etsla tesla estla setla tsela stela latse altse ltase tlase atlse talse laste alste lsate slate aslte salte ltsae tlsae lstae sltae tslae stlae atsle tasle astle satle tsale stale eatsl aetsl etasl teasl atesl taesl eastl aestl esatl seatl asetl saetl etsal tesal estal setal tseal steal atsel tasel astel satel tsael stael
Note: these 'words' (valid or invalid) are all the permutations of the word leats. These words are obtained by scrambling the letters in leats.