benis ebnis bneis nbeis enbis nebis beins ebins biens ibens eibns iebns bnies nbies bines ibnes nibes inbes enibs neibs einbs ienbs niebs inebs bensi ebnsi bnesi nbesi enbsi nebsi besni ebsni bseni sbeni esbni sebni bnsei nbsei bsnei sbnei nsbei snbei ensbi nesbi esnbi senbi nsebi snebi beisn ebisn biesn ibesn eibsn iebsn besin ebsin bsein sbein esbin sebin bisen ibsen bsien sbien isben siben eisbn iesbn esibn seibn isebn siebn bnise nbise binse ibnse nibse inbse bnsie nbsie bsnie sbnie nsbie snbie bisne ibsne bsine sbine isbne sibne nisbe insbe nsibe snibe isnbe sinbe enisb neisb einsb iensb niesb inesb ensib nesib esnib senib nseib sneib eisnb iesnb esinb seinb isenb sienb niseb inseb nsieb snieb isneb sineb
Note: these 'words' (valid or invalid) are all the permutations of the word benis. These words are obtained by scrambling the letters in benis.