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