ssild ssild sisld issld sisld issld sslid sslid slsid lssid slsid lssid silsd islsd slisd lsisd ilssd lissd silsd islsd slisd lsisd ilssd lissd ssidl ssidl sisdl issdl sisdl issdl ssdil ssdil sdsil dssil sdsil dssil sidsl isdsl sdisl dsisl idssl dissl sidsl isdsl sdisl dsisl idssl dissl ssldi ssldi slsdi lssdi slsdi lssdi ssdli ssdli sdsli dssli sdsli dssli sldsi lsdsi sdlsi dslsi ldssi dlssi sldsi lsdsi sdlsi dslsi ldssi dlssi silds islds slids lsids ilsds lisds sidls isdls sdils dsils idsls disls sldis lsdis sdlis dslis ldsis dlsis ildss lidss idlss dilss ldiss dliss silds islds slids lsids ilsds lisds sidls isdls sdils dsils idsls disls sldis lsdis sdlis dslis ldsis dlsis ildss lidss idlss dilss ldiss dliss
Note: these 'words' (valid or invalid) are all the permutations of the word ssild. These words are obtained by scrambling the letters in ssild.