trass rtass tarss atrss ratss artss trsas rtsas tsras stras rstas srtas tasrs atsrs tsars stars astrs satrs rasts arsts rsats srats asrts sarts trass rtass tarss atrss ratss artss trsas rtsas tsras stras rstas srtas tasrs atsrs tsars stars astrs satrs rasts arsts rsats srats asrts sarts trssa rtssa tsrsa strsa rstsa srtsa trssa rtssa tsrsa strsa rstsa srtsa tssra stsra tssra stsra sstra sstra rssta srsta rssta srsta ssrta ssrta tassr atssr tsasr stasr astsr satsr tassr atssr tsasr stasr astsr satsr tssar stsar tssar stsar sstar sstar asstr sastr asstr sastr ssatr ssatr rasst arsst rsast srast asrst sarst rasst arsst rsast srast asrst sarst rssat srsat rssat srsat ssrat ssrat assrt sasrt assrt sasrt ssart ssart
Note: these 'words' (valid or invalid) are all the permutations of the word trass. These words are obtained by scrambling the letters in trass.