ndseb dnseb nsdeb sndeb dsneb sdneb ndesb dnesb nedsb endsb densb ednsb nsedb snedb nesdb ensdb sendb esndb dsenb sdenb desnb edsnb sednb esdnb ndsbe dnsbe nsdbe sndbe dsnbe sdnbe ndbse dnbse nbdse bndse dbnse bdnse nsbde snbde nbsde bnsde sbnde bsnde dsbne sdbne dbsne bdsne sbdne bsdne ndebs dnebs nedbs endbs denbs ednbs ndbes dnbes nbdes bndes dbnes bdnes nebds enbds nbeds bneds ebnds bends debns edbns dbens bdens ebdns bedns nsebd snebd nesbd ensbd senbd esnbd nsbed snbed nbsed bnsed sbned bsned nebsd enbsd nbesd bnesd ebnsd bensd sebnd esbnd sbend bsend ebsnd besnd dsebn sdebn desbn edsbn sedbn esdbn dsben sdben dbsen bdsen sbden bsden debsn edbsn dbesn bdesn ebdsn bedsn sebdn esbdn sbedn bsedn ebsdn besdn
Note: these 'words' (valid or invalid) are all the permutations of the word ndseb. These words are obtained by scrambling the letters in ndseb.