slebs lsebs selbs eslbs lesbs elsbs slbes lsbes sbles bsles lbses blses sebls esbls sbels bsels ebsls besls lebss elbss lbess bless eblss belss slesb lsesb selsb eslsb lessb elssb slseb lsseb ssleb ssleb lsseb slseb seslb esslb sselb sselb esslb seslb lessb elssb lsesb slesb eslsb selsb slbse lsbse sblse bslse lbsse blsse slsbe lssbe sslbe sslbe lssbe slsbe sbsle bssle ssble ssble bssle sbsle lbsse blsse lsbse slbse bslse sblse sebsl esbsl sbesl bsesl ebssl bessl sesbl essbl ssebl ssebl essbl sesbl sbsel bssel ssbel ssbel bssel sbsel ebssl bessl esbsl sebsl bsesl sbesl lebss elbss lbess bless eblss belss lesbs elsbs lsebs slebs eslbs selbs lbses blses lsbes slbes bsles sbles ebsls besls esbls sebls bsels sbels
Note: these 'words' (valid or invalid) are all the permutations of the word slebs. These words are obtained by scrambling the letters in slebs.