murein umrein mruein rmuein urmein rumein muerin umerin meurin emurin uemrin eumrin mreuin rmeuin meruin emruin remuin ermuin uremin ruemin uermin eurmin reumin erumin murien umrien mruien rmuien urmien rumien muiren umiren miuren imuren uimren iumren mriuen rmiuen miruen imruen rimuen irmuen urimen ruimen uirmen iurmen riumen irumen mueirn umeirn meuirn emuirn uemirn eumirn muiern umiern miuern imuern uimern iumern meiurn emiurn mieurn imeurn eimurn iemurn ueimrn euimrn uiemrn iuemrn eiumrn ieumrn mreiun rmeiun meriun emriun remiun ermiun mrieun rmieun mireun imreun rimeun irmeun meirun emirun mierun imerun eimrun iemrun reimun erimun riemun iremun eirmun iermun ureimn rueimn uerimn eurimn reuimn eruimn uriemn ruiemn uiremn iuremn riuemn iruemn ueirmn euirmn uiermn iuermn eiurmn ieurmn reiumn eriumn rieumn ireumn eirumn ierumn mureni umreni mrueni rmueni urmeni rumeni muerni umerni meurni emurni uemrni eumrni mreuni rmeuni meruni emruni remuni ermuni uremni ruemni uermni eurmni reumni erumni murnei umrnei mrunei rmunei urmnei rumnei munrei umnrei mnurei nmurei unmrei numrei mrnuei rmnuei mnruei nmruei rnmuei nrmuei urnmei runmei unrmei nurmei rnumei nrumei muenri umenri meunri emunri uemnri eumnri muneri umneri mnueri nmueri unmeri numeri menuri emnuri mneuri nmeuri enmuri nemuri uenmri eunmri unemri nuemri enumri neumri mrenui rmenui mernui emrnui remnui ermnui mrneui rmneui mnreui nmreui rnmeui nrmeui menrui emnrui mnerui nmerui enmrui nemrui renmui ernmui rnemui nremui enrmui nermui urenmi ruenmi uernmi eurnmi reunmi erunmi urnemi runemi unremi nuremi rnuemi nruemi uenrmi eunrmi unermi nuermi enurmi neurmi renumi ernumi rneumi nreumi enrumi nerumi murine umrine mruine rmuine urmine rumine muirne umirne miurne imurne uimrne iumrne mriune rmiune mirune imrune rimune irmune urimne ruimne uirmne iurmne riumne irumne murnie umrnie mrunie rmunie urmnie rumnie munrie umnrie mnurie nmurie unmrie numrie mrnuie rmnuie mnruie nmruie rnmuie nrmuie urnmie runmie unrmie nurmie rnumie nrumie muinre uminre miunre imunre uimnre iumnre munire umnire mnuire nmuire unmire numire minure imnure mniure nmiure inmure nimure uinmre iunmre unimre nuimre inumre niumre mrinue rminue mirnue imrnue rimnue irmnue mrniue rmniue mnriue nmriue rnmiue nrmiue minrue imnrue mnirue nmirue inmrue nimrue rinmue irnmue rnimue nrimue inrmue nirmue urinme ruinme uirnme iurnme riunme irunme urnime runime unrime nurime rnuime nruime uinrme iunrme unirme nuirme inurme niurme rinume irnume rniume nriume inrume nirume mueinr umeinr meuinr emuinr ueminr euminr muienr umienr miuenr imuenr uimenr iumenr meiunr emiunr mieunr imeunr eimunr iemunr ueimnr euimnr uiemnr iuemnr eiumnr ieumnr muenir umenir meunir emunir uemnir eumnir muneir umneir mnueir nmueir unmeir numeir menuir emnuir mneuir nmeuir enmuir nemuir uenmir eunmir unemir nuemir enumir neumir muiner uminer miuner imuner uimner iumner munier umnier mnuier nmuier unmier numier minuer imnuer mniuer nmiuer inmuer nimuer uinmer iunmer unimer nuimer inumer niumer meinur eminur mienur imenur eimnur iemnur meniur emniur mneiur nmeiur enmiur nemiur mineur imneur mnieur nmieur inmeur nimeur einmur ienmur enimur neimur inemur niemur ueinmr euinmr uienmr iuenmr eiunmr ieunmr uenimr eunimr uneimr nueimr enuimr neuimr uinemr iunemr uniemr nuiemr inuemr niuemr einumr ienumr eniumr neiumr ineumr nieumr mreinu rmeinu merinu emrinu reminu erminu mrienu rmienu mirenu imrenu rimenu irmenu meirnu emirnu miernu imernu eimrnu iemrnu reimnu erimnu riemnu iremnu eirmnu iermnu mreniu rmeniu merniu emrniu remniu ermniu mrneiu rmneiu mnreiu nmreiu rnmeiu nrmeiu menriu emnriu mneriu nmeriu enmriu nemriu renmiu ernmiu rnemiu nremiu enrmiu nermiu mrineu rmineu mirneu imrneu rimneu irmneu mrnieu rmnieu mnrieu nmrieu rnmieu nrmieu minreu imnreu mnireu nmireu inmreu nimreu rinmeu irnmeu rnimeu nrimeu inrmeu nirmeu meinru eminru mienru imenru eimnru iemnru meniru emniru mneiru nmeiru enmiru nemiru mineru imneru mnieru nmieru inmeru nimeru einmru ienmru enimru neimru inemru niemru reinmu erinmu rienmu irenmu eirnmu iernmu renimu ernimu rneimu nreimu enrimu nerimu rinemu irnemu rniemu nriemu inremu niremu einrmu ienrmu enirmu neirmu inermu niermu ureinm rueinm uerinm eurinm reuinm eruinm urienm ruienm uirenm iurenm riuenm iruenm ueirnm euirnm uiernm iuernm eiurnm ieurnm reiunm eriunm rieunm ireunm eirunm ierunm urenim ruenim uernim eurnim reunim erunim urneim runeim unreim nureim rnueim nrueim uenrim eunrim unerim nuerim enurim neurim renuim ernuim rneuim nreuim enruim neruim urinem ruinem uirnem iurnem riunem irunem urniem runiem unriem nuriem rnuiem nruiem uinrem iunrem unirem nuirem inurem niurem rinuem irnuem rniuem nriuem inruem niruem ueinrm euinrm uienrm iuenrm eiunrm ieunrm uenirm eunirm uneirm nueirm enuirm neuirm uinerm iunerm unierm nuierm inuerm niuerm einurm ienurm eniurm neiurm ineurm nieurm reinum erinum rienum irenum eirnum iernum renium ernium rneium nreium enrium nerium rineum irneum rnieum nrieum inreum nireum einrum ienrum enirum neirum inerum nierum
Note: these 'words' (valid or invalid) are all the permutations of the word murein. These words are obtained by scrambling the letters in murein.