terts etrts trets rtets ertts retts tetrs ettrs tters tters ettrs tetrs trtes rttes ttres ttres rttes trtes ertts retts etrts terts rtets trets terst etrst trest rtest ertst retst tesrt etsrt tsert stert estrt setrt trset rtset tsret stret rstet srtet erstt restt esrtt sertt rsett srett tetsr ettsr ttesr ttesr ettsr tetsr testr etstr tsetr stetr esttr settr ttser ttser tster stter tster stter etstr testr esttr settr tsetr stetr trtse rttse ttrse ttrse rttse trtse trste rtste tsrte strte rstte srtte ttsre ttsre tstre sttre tstre sttre rtste trste rstte srtte tsrte strte ertst retst etrst terst rtest trest erstt restt esrtt sertt rsett srett etsrt tesrt estrt setrt tsert stert rtset trset rstet srtet tsret stret
Note: these 'words' (valid or invalid) are all the permutations of the word terts. These words are obtained by scrambling the letters in terts.