tilts itlts tlits ltits iltts litts titls ittls ttils ttils ittls titls tltis lttis ttlis ttlis lttis tltis iltts litts itlts tilts ltits tlits tilst itlst tlist ltist iltst litst tislt itslt tsilt stilt istlt sitlt tlsit ltsit tslit stlit lstit sltit ilstt listt isltt siltt lsitt slitt titsl ittsl ttisl ttisl ittsl titsl tistl itstl tsitl stitl isttl sittl ttsil ttsil tstil sttil tstil sttil itstl tistl isttl sittl tsitl stitl tltsi lttsi ttlsi ttlsi lttsi tltsi tlsti ltsti tslti stlti lstti sltti ttsli ttsli tstli sttli tstli sttli ltsti tlsti lstti sltti tslti stlti iltst litst itlst tilst ltist tlist ilstt listt isltt siltt lsitt slitt itslt tislt istlt sitlt tsilt stilt ltsit tlsit lstit sltit tslit stlit
Note: these 'words' (valid or invalid) are all the permutations of the word tilts. These words are obtained by scrambling the letters in tilts.