sisbl issbl ssibl ssibl issbl sisbl sibsl isbsl sbisl bsisl ibssl bissl ssbil ssbil sbsil bssil sbsil bssil isbsl sibsl ibssl bissl sbisl bsisl sislb isslb ssilb ssilb isslb sislb silsb islsb slisb lsisb ilssb lissb sslib sslib slsib lssib slsib lssib islsb silsb ilssb lissb slisb lsisb sibls isbls sbils bsils ibsls bisls silbs islbs slibs lsibs ilsbs lisbs sblis bslis slbis lsbis blsis lbsis iblss bilss ilbss libss bliss lbiss ssbli ssbli sbsli bssli sbsli bssli sslbi sslbi slsbi lssbi slsbi lssbi sblsi bslsi slbsi lsbsi blssi lbssi sblsi bslsi slbsi lsbsi blssi lbssi isbls sibls ibsls bisls sbils bsils islbs silbs ilsbs lisbs slibs lsibs iblss bilss ilbss libss bliss lbiss sblis bslis slbis lsbis blsis lbsis
Note: these 'words' (valid or invalid) are all the permutations of the word sisbl. These words are obtained by scrambling the letters in sisbl.