birred ibrred brired rbired irbred ribred birred ibrred brired rbired irbred ribred brried rbried brried rbried rrbied rrbied irrbed rirbed irrbed rirbed rribed rribed birerd ibrerd brierd rbierd irberd riberd bierrd iberrd beirrd ebirrd iebrrd eibrrd breird rbeird berird ebrird rebird erbird irebrd riebrd ierbrd eirbrd reibrd eribrd birerd ibrerd brierd rbierd irberd riberd bierrd iberrd beirrd ebirrd iebrrd eibrrd breird rbeird berird ebrird rebird erbird irebrd riebrd ierbrd eirbrd reibrd eribrd brreid rbreid brreid rbreid rrbeid rrbeid brerid rberid berrid ebrrid rebrid erbrid brerid rberid berrid ebrrid rebrid erbrid rrebid rrebid rerbid errbid rerbid errbid irrebd rirebd irrebd rirebd rriebd rriebd irerbd rierbd ierrbd eirrbd reirbd erirbd irerbd rierbd ierrbd eirrbd reirbd erirbd rreibd rreibd reribd erribd reribd erribd birrde ibrrde brirde rbirde irbrde ribrde birrde ibrrde brirde rbirde irbrde ribrde brride rbride brride rbride rrbide rrbide irrbde rirbde irrbde rirbde rribde rribde birdre ibrdre bridre rbidre irbdre ribdre bidrre ibdrre bdirre dbirre idbrre dibrre brdire rbdire bdrire dbrire rdbire drbire irdbre ridbre idrbre dirbre rdibre dribre birdre ibrdre bridre rbidre irbdre ribdre bidrre ibdrre bdirre dbirre idbrre dibrre brdire rbdire bdrire dbrire rdbire drbire irdbre ridbre idrbre dirbre rdibre dribre brrdie rbrdie brrdie rbrdie rrbdie rrbdie brdrie rbdrie bdrrie dbrrie rdbrie drbrie brdrie rbdrie bdrrie dbrrie rdbrie drbrie rrdbie rrdbie rdrbie drrbie rdrbie drrbie irrdbe rirdbe irrdbe rirdbe rridbe rridbe irdrbe ridrbe idrrbe dirrbe rdirbe drirbe irdrbe ridrbe idrrbe dirrbe rdirbe drirbe rrdibe rrdibe rdribe drribe rdribe drribe biredr ibredr briedr rbiedr irbedr ribedr bierdr iberdr beirdr ebirdr iebrdr eibrdr breidr rbeidr beridr ebridr rebidr erbidr irebdr riebdr ierbdr eirbdr reibdr eribdr birder ibrder brider rbider irbder ribder bidrer ibdrer bdirer dbirer idbrer dibrer brdier rbdier bdrier dbrier rdbier drbier irdber ridber idrber dirber rdiber driber biedrr ibedrr beidrr ebidrr iebdrr eibdrr biderr ibderr bdierr dbierr idberr diberr bedirr ebdirr bdeirr dbeirr edbirr debirr iedbrr eidbrr idebrr diebrr edibrr deibrr bredir rbedir berdir ebrdir rebdir erbdir brdeir rbdeir bdreir dbreir rdbeir drbeir bedrir ebdrir bderir dberir edbrir debrir redbir erdbir rdebir drebir edrbir derbir iredbr riedbr ierdbr eirdbr reidbr eridbr irdebr ridebr idrebr direbr rdiebr driebr iedrbr eidrbr iderbr dierbr edirbr deirbr redibr erdibr rdeibr dreibr edribr deribr biredr ibredr briedr rbiedr irbedr ribedr bierdr iberdr beirdr ebirdr iebrdr eibrdr breidr rbeidr beridr ebridr rebidr erbidr irebdr riebdr ierbdr eirbdr reibdr eribdr birder ibrder brider rbider irbder ribder bidrer ibdrer bdirer dbirer idbrer dibrer brdier rbdier bdrier dbrier rdbier drbier irdber ridber idrber dirber rdiber driber biedrr ibedrr beidrr ebidrr iebdrr eibdrr biderr ibderr bdierr dbierr idberr diberr bedirr ebdirr bdeirr dbeirr edbirr debirr iedbrr eidbrr idebrr diebrr edibrr deibrr bredir rbedir berdir ebrdir rebdir erbdir brdeir rbdeir bdreir dbreir rdbeir drbeir bedrir ebdrir bderir dberir edbrir debrir redbir erdbir rdebir drebir edrbir derbir iredbr riedbr ierdbr eirdbr reidbr eridbr irdebr ridebr idrebr direbr rdiebr driebr iedrbr eidrbr iderbr dierbr edirbr deirbr redibr erdibr rdeibr dreibr edribr deribr brredi rbredi brredi rbredi rrbedi rrbedi brerdi rberdi berrdi ebrrdi rebrdi erbrdi brerdi rberdi berrdi ebrrdi rebrdi erbrdi rrebdi rrebdi rerbdi errbdi rerbdi errbdi brrdei rbrdei brrdei rbrdei rrbdei rrbdei brdrei rbdrei bdrrei dbrrei rdbrei drbrei brdrei rbdrei bdrrei dbrrei rdbrei drbrei rrdbei rrdbei rdrbei drrbei rdrbei drrbei bredri rbedri berdri ebrdri rebdri erbdri brderi rbderi bdreri dbreri rdberi drberi bedrri ebdrri bderri dberri edbrri debrri redbri erdbri rdebri drebri edrbri derbri bredri rbedri berdri ebrdri rebdri erbdri brderi rbderi bdreri dbreri rdberi drberi bedrri ebdrri bderri dberri edbrri debrri redbri erdbri rdebri drebri edrbri derbri rredbi rredbi rerdbi errdbi rerdbi errdbi rrdebi rrdebi rdrebi drrebi rdrebi drrebi redrbi erdrbi rderbi drerbi edrrbi derrbi redrbi erdrbi rderbi drerbi edrrbi derrbi irredb riredb irredb riredb rriedb rriedb irerdb rierdb ierrdb eirrdb reirdb erirdb irerdb rierdb ierrdb eirrdb reirdb erirdb rreidb rreidb reridb erridb reridb erridb irrdeb rirdeb irrdeb rirdeb rrideb rrideb irdreb ridreb idrreb dirreb rdireb drireb irdreb ridreb idrreb dirreb rdireb drireb rrdieb rrdieb rdrieb drrieb rdrieb drrieb iredrb riedrb ierdrb eirdrb reidrb eridrb irderb riderb idrerb direrb rdierb drierb iedrrb eidrrb iderrb dierrb edirrb deirrb redirb erdirb rdeirb dreirb edrirb derirb iredrb riedrb ierdrb eirdrb reidrb eridrb irderb riderb idrerb direrb rdierb drierb iedrrb eidrrb iderrb dierrb edirrb deirrb redirb erdirb rdeirb dreirb edrirb derirb rredib rredib rerdib errdib rerdib errdib rrdeib rrdeib rdreib drreib rdreib drreib redrib erdrib rderib drerib edrrib derrib redrib erdrib rderib drerib edrrib derrib
Note: these 'words' (valid or invalid) are all the permutations of the word birred. These words are obtained by scrambling the letters in birred.