dumber udmber dmuber mduber umdber mudber dubmer udbmer dbumer bdumer ubdmer budmer dmbuer mdbuer dbmuer bdmuer mbduer bmduer umbder mubder ubmder bumder mbuder bmuder dumebr udmebr dmuebr mduebr umdebr mudebr duembr udembr deumbr edumbr uedmbr eudmbr dmeubr mdeubr demubr edmubr medubr emdubr umedbr muedbr uemdbr eumdbr meudbr emudbr dubemr udbemr dbuemr bduemr ubdemr budemr duebmr udebmr deubmr edubmr uedbmr eudbmr dbeumr bdeumr debumr edbumr bedumr ebdumr ubedmr buedmr uebdmr eubdmr beudmr ebudmr dmbeur mdbeur dbmeur bdmeur mbdeur bmdeur dmebur mdebur dembur edmbur medbur emdbur dbemur bdemur debmur edbmur bedmur ebdmur mbedur bmedur mebdur embdur bemdur ebmdur umbedr mubedr ubmedr bumedr mbuedr bmuedr umebdr muebdr uembdr eumbdr meubdr emubdr ubemdr buemdr uebmdr eubmdr beumdr ebumdr mbeudr bmeudr mebudr embudr bemudr ebmudr dumbre udmbre dmubre mdubre umdbre mudbre dubmre udbmre dbumre bdumre ubdmre budmre dmbure mdbure dbmure bdmure mbdure bmdure umbdre mubdre ubmdre bumdre mbudre bmudre dumrbe udmrbe dmurbe mdurbe umdrbe mudrbe durmbe udrmbe drumbe rdumbe urdmbe rudmbe dmrube mdrube drmube rdmube mrdube rmdube umrdbe murdbe urmdbe rumdbe mrudbe rmudbe dubrme udbrme dburme bdurme ubdrme budrme durbme udrbme drubme rdubme urdbme rudbme dbrume bdrume drbume rdbume brdume rbdume ubrdme burdme urbdme rubdme brudme rbudme dmbrue mdbrue dbmrue bdmrue mbdrue bmdrue dmrbue mdrbue drmbue rdmbue mrdbue rmdbue dbrmue bdrmue drbmue rdbmue brdmue rbdmue mbrdue bmrdue mrbdue rmbdue brmdue rbmdue umbrde mubrde ubmrde bumrde mburde bmurde umrbde murbde urmbde rumbde mrubde rmubde ubrmde burmde urbmde rubmde brumde rbumde mbrude bmrude mrbude rmbude brmude rbmude dumerb udmerb dmuerb mduerb umderb muderb duemrb udemrb deumrb edumrb uedmrb eudmrb dmeurb mdeurb demurb edmurb medurb emdurb umedrb muedrb uemdrb eumdrb meudrb emudrb dumreb udmreb dmureb mdureb umdreb mudreb durmeb udrmeb drumeb rdumeb urdmeb rudmeb dmrueb mdrueb drmueb rdmueb mrdueb rmdueb umrdeb murdeb urmdeb rumdeb mrudeb rmudeb duermb udermb deurmb edurmb uedrmb eudrmb duremb udremb druemb rduemb urdemb rudemb derumb edrumb dreumb rdeumb erdumb redumb uerdmb eurdmb uredmb ruedmb erudmb reudmb dmerub mderub demrub edmrub medrub emdrub dmreub mdreub drmeub rdmeub mrdeub rmdeub dermub edrmub dremub rdemub erdmub redmub merdub emrdub mredub rmedub ermdub remdub umerdb muerdb uemrdb eumrdb meurdb emurdb umredb muredb urmedb rumedb mruedb rmuedb uermdb eurmdb uremdb ruemdb erumdb reumdb merudb emrudb mreudb rmeudb ermudb remudb duberm udberm dbuerm bduerm ubderm buderm duebrm udebrm deubrm edubrm uedbrm eudbrm dbeurm bdeurm deburm edburm bedurm ebdurm ubedrm buedrm uebdrm eubdrm beudrm ebudrm dubrem udbrem dburem bdurem ubdrem budrem durbem udrbem drubem rdubem urdbem rudbem dbruem bdruem drbuem rdbuem brduem rbduem ubrdem burdem urbdem rubdem brudem rbudem duerbm uderbm deurbm edurbm uedrbm eudrbm durebm udrebm druebm rduebm urdebm rudebm derubm edrubm dreubm rdeubm erdubm redubm uerdbm eurdbm uredbm ruedbm erudbm reudbm dberum bderum debrum edbrum bedrum ebdrum dbreum bdreum drbeum rdbeum brdeum rbdeum derbum edrbum drebum rdebum erdbum redbum berdum ebrdum bredum rbedum erbdum rebdum uberdm buerdm uebrdm eubrdm beurdm eburdm ubredm buredm urbedm rubedm bruedm rbuedm uerbdm eurbdm urebdm ruebdm erubdm reubdm berudm ebrudm breudm rbeudm erbudm rebudm dmberu mdberu dbmeru bdmeru mbderu bmderu dmebru mdebru dembru edmbru medbru emdbru dbemru bdemru debmru edbmru bedmru ebdmru mbedru bmedru mebdru embdru bemdru ebmdru dmbreu mdbreu dbmreu bdmreu mbdreu bmdreu dmrbeu mdrbeu drmbeu rdmbeu mrdbeu rmdbeu dbrmeu bdrmeu drbmeu rdbmeu brdmeu rbdmeu mbrdeu bmrdeu mrbdeu rmbdeu brmdeu rbmdeu dmerbu mderbu demrbu edmrbu medrbu emdrbu dmrebu mdrebu drmebu rdmebu mrdebu rmdebu dermbu edrmbu drembu rdembu erdmbu redmbu merdbu emrdbu mredbu rmedbu ermdbu remdbu dbermu bdermu debrmu edbrmu bedrmu ebdrmu dbremu bdremu drbemu rdbemu brdemu rbdemu derbmu edrbmu drebmu rdebmu erdbmu redbmu berdmu ebrdmu bredmu rbedmu erbdmu rebdmu mberdu bmerdu mebrdu embrdu bemrdu ebmrdu mbredu bmredu mrbedu rmbedu brmedu rbmedu merbdu emrbdu mrebdu rmebdu ermbdu rembdu bermdu ebrmdu bremdu rbemdu erbmdu rebmdu umberd muberd ubmerd bumerd mbuerd bmuerd umebrd muebrd uembrd eumbrd meubrd emubrd ubemrd buemrd uebmrd eubmrd beumrd ebumrd mbeurd bmeurd meburd emburd bemurd ebmurd umbred mubred ubmred bumred mbured bmured umrbed murbed urmbed rumbed mrubed rmubed ubrmed burmed urbmed rubmed brumed rbumed mbrued bmrued mrbued rmbued brmued rbmued umerbd muerbd uemrbd eumrbd meurbd emurbd umrebd murebd urmebd rumebd mruebd rmuebd uermbd eurmbd urembd ruembd erumbd reumbd merubd emrubd mreubd rmeubd ermubd remubd ubermd buermd uebrmd eubrmd beurmd eburmd ubremd buremd urbemd rubemd bruemd rbuemd uerbmd eurbmd urebmd ruebmd erubmd reubmd berumd ebrumd breumd rbeumd erbumd rebumd mberud bmerud mebrud embrud bemrud ebmrud mbreud bmreud mrbeud rmbeud brmeud rbmeud merbud emrbud mrebud rmebud ermbud rembud bermud ebrmud bremud rbemud erbmud rebmud
Note: these 'words' (valid or invalid) are all the permutations of the word dumber. These words are obtained by scrambling the letters in dumber.