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