lists ilsts lsits slits islts silts litss iltss ltiss tliss itlss tilss lstis sltis ltsis tlsis stlis tslis istls sitls itsls tisls stils tsils lisst ilsst lsist slist islst silst lisst ilsst lsist slist islst silst lssit slsit lssit slsit sslit sslit isslt sislt isslt sislt ssilt ssilt litss iltss ltiss tliss itlss tilss lists ilsts lsits slits islts silts ltsis tlsis lstis sltis tslis stlis itsls tisls istls sitls tsils stils lstsi sltsi ltssi tlssi stlsi tslsi lssti slsti lssti slsti sslti sslti ltssi tlssi lstsi sltsi tslsi stlsi stsli tssli sstli sstli tssli stsli istsl sitsl itssl tissl stisl tsisl isstl sistl isstl sistl ssitl ssitl itssl tissl istsl sitsl tsisl stisl stsil tssil sstil sstil tssil stsil
Note: these 'words' (valid or invalid) are all the permutations of the word lists. These words are obtained by scrambling the letters in lists.