siysl isysl syisl ysisl iyssl yissl sisyl issyl ssiyl ssiyl issyl sisyl sysil yssil ssyil ssyil yssil sysil iyssl yissl isysl siysl ysisl syisl siyls isyls syils ysils iysls yisls silys islys sliys lsiys ilsys lisys sylis yslis slyis lsyis ylsis lysis iylss yilss ilyss liyss yliss lyiss sisly issly ssily ssily issly sisly silsy islsy slisy lsisy ilssy lissy ssliy ssliy slsiy lssiy slsiy lssiy islsy silsy ilssy lissy slisy lsisy sysli yssli ssyli ssyli yssli sysli sylsi yslsi slysi lsysi ylssi lyssi sslyi sslyi slsyi lssyi slsyi lssyi yslsi sylsi ylssi lyssi slysi lsysi iysls yisls isyls siyls ysils syils iylss yilss ilyss liyss yliss lyiss islys silys ilsys lisys sliys lsiys yslis sylis ylsis lysis slyis lsyis
Note: these 'words' (valid or invalid) are all the permutations of the word siysl. These words are obtained by scrambling the letters in siysl.