bensb ebnsb bnesb nbesb enbsb nebsb besnb ebsnb bsenb sbenb esbnb sebnb bnseb nbseb bsneb sbneb nsbeb snbeb ensbb nesbb esnbb senbb nsebb snebb benbs ebnbs bnebs nbebs enbbs nebbs bebns ebbns bbens bbens ebbns bebns bnbes nbbes bbnes bbnes nbbes bnbes enbbs nebbs ebnbs benbs nbebs bnebs besbn ebsbn bsebn sbebn esbbn sebbn bebsn ebbsn bbesn bbesn ebbsn bebsn bsben sbben bbsen bbsen sbben bsben esbbn sebbn ebsbn besbn sbebn bsebn bnsbe nbsbe bsnbe sbnbe nsbbe snbbe bnbse nbbse bbnse bbnse nbbse bnbse bsbne sbbne bbsne bbsne sbbne bsbne nsbbe snbbe nbsbe bnsbe sbnbe bsnbe ensbb nesbb esnbb senbb nsebb snebb enbsb nebsb ebnsb bensb nbesb bnesb esbnb sebnb ebsnb besnb sbenb bsenb nsbeb snbeb nbseb bnseb sbneb bsneb
Note: these 'words' (valid or invalid) are all the permutations of the word bensb. These words are obtained by scrambling the letters in bensb.