silos islos slios lsios ilsos lisos siols isols soils osils iosls oisls slois lsois solis oslis losis olsis iloss lioss iolss oilss loiss oliss silso islso sliso lsiso ilsso lisso sislo isslo ssilo ssilo isslo sislo slsio lssio sslio sslio lssio slsio ilsso lisso islso silso lsiso sliso siosl isosl soisl osisl iossl oissl sisol issol ssiol ssiol issol sisol sosil ossil ssoil ssoil ossil sosil iossl oissl isosl siosl osisl soisl slosi lsosi solsi oslsi lossi olssi slsoi lssoi ssloi ssloi lssoi slsoi sosli ossli ssoli ssoli ossli sosli lossi olssi lsosi slosi oslsi solsi iloss lioss iolss oilss loiss oliss ilsos lisos islos silos lsios slios iosls oisls isols siols osils soils losis olsis lsois slois oslis solis
Note: these 'words' (valid or invalid) are all the permutations of the word silos. These words are obtained by scrambling the letters in silos.