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