duller udller dluler lduler uldler ludler duller udller dluler lduler uldler ludler dlluer ldluer dlluer ldluer llduer llduer ullder lulder ullder lulder lluder lluder dulelr udlelr dluelr lduelr uldelr ludelr duellr udellr deullr edullr uedllr eudllr dleulr ldeulr delulr edlulr ledulr eldulr uledlr luedlr ueldlr euldlr leudlr eludlr dulelr udlelr dluelr lduelr uldelr ludelr duellr udellr deullr edullr uedllr eudllr dleulr ldeulr delulr edlulr ledulr eldulr uledlr luedlr ueldlr euldlr leudlr eludlr dlleur ldleur dlleur ldleur lldeur lldeur dlelur ldelur dellur edllur ledlur eldlur dlelur ldelur dellur edllur ledlur eldlur lledur lledur leldur elldur leldur elldur ulledr luledr ulledr luledr lluedr lluedr uleldr lueldr uelldr eulldr leuldr eluldr uleldr lueldr uelldr eulldr leuldr eluldr lleudr lleudr leludr elludr leludr elludr dullre udllre dlulre ldulre uldlre ludlre dullre udllre dlulre ldulre uldlre ludlre dllure ldlure dllure ldlure lldure lldure ulldre luldre ulldre luldre lludre lludre dulrle udlrle dlurle ldurle uldrle ludrle durlle udrlle drulle rdulle urdlle rudlle dlrule ldrule drlule rdlule lrdule rldule ulrdle lurdle urldle ruldle lrudle rludle dulrle udlrle dlurle ldurle uldrle ludrle durlle udrlle drulle rdulle urdlle rudlle dlrule ldrule drlule rdlule lrdule rldule ulrdle lurdle urldle ruldle lrudle rludle dllrue ldlrue dllrue ldlrue lldrue lldrue dlrlue ldrlue drllue rdllue lrdlue rldlue dlrlue ldrlue drllue rdllue lrdlue rldlue llrdue llrdue lrldue rlldue lrldue rlldue ullrde lulrde ullrde lulrde llurde llurde ulrlde lurlde urllde rullde lrulde rlulde ulrlde lurlde urllde rullde lrulde rlulde llrude llrude lrlude rllude lrlude rllude dulerl udlerl dluerl lduerl ulderl luderl duelrl udelrl deulrl edulrl uedlrl eudlrl dleurl ldeurl delurl edlurl ledurl eldurl uledrl luedrl ueldrl euldrl leudrl eludrl dulrel udlrel dlurel ldurel uldrel ludrel durlel udrlel drulel rdulel urdlel rudlel dlruel ldruel drluel rdluel lrduel rlduel ulrdel lurdel urldel ruldel lrudel rludel duerll uderll deurll edurll uedrll eudrll durell udrell druell rduell urdell rudell derull edrull dreull rdeull erdull redull uerdll eurdll uredll ruedll erudll reudll dlerul lderul delrul edlrul ledrul eldrul dlreul ldreul drleul rdleul lrdeul rldeul derlul edrlul drelul rdelul erdlul redlul lerdul elrdul lredul rledul erldul reldul ulerdl luerdl uelrdl eulrdl leurdl elurdl ulredl luredl urledl ruledl lruedl rluedl uerldl eurldl ureldl rueldl eruldl reuldl lerudl elrudl lreudl rleudl erludl reludl dulerl udlerl dluerl lduerl ulderl luderl duelrl udelrl deulrl edulrl uedlrl eudlrl dleurl ldeurl delurl edlurl ledurl eldurl uledrl luedrl ueldrl euldrl leudrl eludrl dulrel udlrel dlurel ldurel uldrel ludrel durlel udrlel drulel rdulel urdlel rudlel dlruel ldruel drluel rdluel lrduel rlduel ulrdel lurdel urldel ruldel lrudel rludel duerll uderll deurll edurll uedrll eudrll durell udrell druell rduell urdell rudell derull edrull dreull rdeull erdull redull uerdll eurdll uredll ruedll erudll reudll dlerul lderul delrul edlrul ledrul eldrul dlreul ldreul drleul rdleul lrdeul rldeul derlul edrlul drelul rdelul erdlul redlul lerdul elrdul lredul rledul erldul reldul ulerdl luerdl uelrdl eulrdl leurdl elurdl ulredl luredl urledl ruledl lruedl rluedl uerldl eurldl ureldl rueldl eruldl reuldl lerudl elrudl lreudl rleudl erludl reludl dlleru ldleru dlleru ldleru llderu llderu dlelru ldelru dellru edllru ledlru eldlru dlelru ldelru dellru edllru ledlru eldlru lledru lledru leldru elldru leldru elldru dllreu ldlreu dllreu ldlreu lldreu lldreu dlrleu ldrleu drlleu rdlleu lrdleu rldleu dlrleu ldrleu drlleu rdlleu lrdleu rldleu llrdeu llrdeu lrldeu rlldeu lrldeu rlldeu dlerlu lderlu delrlu edlrlu ledrlu eldrlu dlrelu ldrelu drlelu rdlelu lrdelu rldelu derllu edrllu drellu rdellu erdllu redllu lerdlu elrdlu lredlu rledlu erldlu reldlu dlerlu lderlu delrlu edlrlu ledrlu eldrlu dlrelu ldrelu drlelu rdlelu lrdelu rldelu derllu edrllu drellu rdellu erdllu redllu lerdlu elrdlu lredlu rledlu erldlu reldlu llerdu llerdu lelrdu ellrdu lelrdu ellrdu llredu llredu lrledu rlledu lrledu rlledu lerldu elrldu lreldu rleldu erlldu relldu lerldu elrldu lreldu rleldu erlldu relldu ullerd lulerd ullerd lulerd lluerd lluerd ulelrd luelrd uellrd eullrd leulrd elulrd ulelrd luelrd uellrd eullrd leulrd elulrd lleurd lleurd lelurd ellurd lelurd ellurd ullred lulred ullred lulred llured llured ulrled lurled urlled rulled lruled rluled ulrled lurled urlled rulled lruled rluled llrued llrued lrlued rllued lrlued rllued ulerld luerld uelrld eulrld leurld elurld ulreld lureld urleld ruleld lrueld rlueld uerlld eurlld urelld ruelld erulld reulld leruld elruld lreuld rleuld erluld reluld ulerld luerld uelrld eulrld leurld elurld ulreld lureld urleld ruleld lrueld rlueld uerlld eurlld urelld ruelld erulld reulld leruld elruld lreuld rleuld erluld reluld llerud llerud lelrud ellrud lelrud ellrud llreud llreud lrleud rlleud lrleud rlleud lerlud elrlud lrelud rlelud erllud rellud lerlud elrlud lrelud rlelud erllud rellud
Note: these 'words' (valid or invalid) are all the permutations of the word duller. These words are obtained by scrambling the letters in duller.