lister ilster lsiter sliter islter silter litser iltser ltiser tliser itlser tilser lstier sltier ltsier tlsier stlier tslier istler sitler itsler tisler stiler tsiler lisetr ilsetr lsietr slietr isletr siletr liestr ilestr leistr elistr ielstr eilstr lseitr sleitr lesitr elsitr selitr eslitr iseltr sieltr iesltr eisltr seiltr esiltr litesr iltesr ltiesr tliesr itlesr tilesr lietsr iletsr leitsr elitsr ieltsr eiltsr lteisr tleisr letisr eltisr telisr etlisr itelsr tielsr ietlsr eitlsr teilsr etilsr lsteir slteir ltseir tlseir stleir tsleir lsetir sletir lestir elstir seltir esltir ltesir tlesir letsir eltsir telsir etlsir stelir tselir setlir estlir teslir etslir istelr sitelr itselr tiselr stielr tsielr isetlr sietlr iestlr eistlr seitlr esitlr iteslr tieslr ietslr eitslr teislr etislr steilr tseilr setilr estilr tesilr etsilr listre ilstre lsitre slitre isltre siltre litsre iltsre ltisre tlisre itlsre tilsre lstire sltire ltsire tlsire stlire tslire istlre sitlre itslre tislre stilre tsilre lisrte ilsrte lsirte slirte islrte silrte lirste ilrste lriste rliste irlste rilste lsrite slrite lrsite rlsite srlite rslite isrlte sirlte irslte rislte srilte rsilte litrse iltrse ltirse tlirse itlrse tilrse lirtse ilrtse lritse rlitse irltse riltse ltrise tlrise lrtise rltise trlise rtlise itrlse tirlse irtlse ritlse trilse rtilse lstrie sltrie ltsrie tlsrie stlrie tslrie lsrtie slrtie lrstie rlstie srltie rsltie ltrsie tlrsie lrtsie rltsie trlsie rtlsie strlie tsrlie srtlie rstlie trslie rtslie istrle sitrle itsrle tisrle stirle tsirle isrtle sirtle irstle ristle sritle rsitle itrsle tirsle irtsle ritsle trisle rtisle strile tsrile srtile rstile trsile rtsile lisert ilsert lsiert sliert islert silert liesrt ilesrt leisrt elisrt ielsrt eilsrt lseirt sleirt lesirt elsirt selirt eslirt iselrt sielrt ieslrt eislrt seilrt esilrt lisret ilsret lsiret sliret islret silret lirset ilrset lriset rliset irlset rilset lsriet slriet lrsiet rlsiet srliet rsliet isrlet sirlet irslet rislet srilet rsilet lierst ilerst leirst elirst ielrst eilrst lirest ilrest lriest rliest irlest rilest lerist elrist lreist rleist erlist relist ierlst eirlst irelst rielst erilst reilst lserit slerit lesrit elsrit selrit eslrit lsreit slreit lrseit rlseit srleit rsleit lersit elrsit lresit rlesit erlsit relsit serlit esrlit srelit rselit erslit reslit iserlt sierlt iesrlt eisrlt seirlt esirlt isrelt sirelt irselt riselt srielt rsielt ierslt eirslt ireslt rieslt erislt reislt serilt esrilt sreilt rseilt ersilt resilt liters ilters ltiers tliers itlers tilers lietrs iletrs leitrs elitrs ieltrs eiltrs lteirs tleirs letirs eltirs telirs etlirs itelrs tielrs ietlrs eitlrs teilrs etilrs litres iltres ltires tlires itlres tilres lirtes ilrtes lrites rlites irltes riltes ltries tlries lrties rlties trlies rtlies itrles tirles irtles ritles triles rtiles lierts ilerts leirts elirts ielrts eilrts lirets ilrets lriets rliets irlets rilets lerits elrits lreits rleits erlits relits ierlts eirlts irelts rielts erilts reilts lteris tleris letris eltris telris etlris ltreis tlreis lrteis rlteis trleis rtleis lertis elrtis lretis rletis erltis reltis terlis etrlis trelis rtelis ertlis retlis iterls tierls ietrls eitrls teirls etirls itrels tirels irtels ritels triels rtiels iertls eirtls iretls rietls eritls reitls terils etrils treils rteils ertils retils lsteri slteri ltseri tlseri stleri tsleri lsetri sletri lestri elstri seltri esltri ltesri tlesri letsri eltsri telsri etlsri stelri tselri setlri estlri teslri etslri lstrei sltrei ltsrei tlsrei stlrei tslrei lsrtei slrtei lrstei rlstei srltei rsltei ltrsei tlrsei lrtsei rltsei trlsei rtlsei strlei tsrlei srtlei rstlei trslei rtslei lserti slerti lesrti elsrti selrti eslrti lsreti slreti lrseti rlseti srleti rsleti lersti elrsti lresti rlesti erlsti relsti serlti esrlti srelti rselti erslti reslti ltersi tlersi letrsi eltrsi telrsi etlrsi ltresi tlresi lrtesi rltesi trlesi rtlesi lertsi elrtsi lretsi rletsi erltsi reltsi terlsi etrlsi trelsi rtelsi ertlsi retlsi sterli tserli setrli estrli tesrli etsrli streli tsreli srteli rsteli trseli rtseli sertli esrtli sretli rsetli erstli restli tersli etrsli tresli rtesli ertsli retsli isterl siterl itserl tiserl stierl tsierl isetrl sietrl iestrl eistrl seitrl esitrl itesrl tiesrl ietsrl eitsrl teisrl etisrl steirl tseirl setirl estirl tesirl etsirl istrel sitrel itsrel tisrel stirel tsirel isrtel sirtel irstel ristel sritel rsitel itrsel tirsel irtsel ritsel trisel rtisel striel tsriel srtiel rstiel trsiel rtsiel isertl siertl iesrtl eisrtl seirtl esirtl isretl siretl irsetl risetl srietl rsietl ierstl eirstl irestl riestl eristl reistl seritl esritl sreitl rseitl ersitl resitl itersl tiersl ietrsl eitrsl teirsl etirsl itresl tiresl irtesl ritesl triesl rtiesl iertsl eirtsl iretsl rietsl eritsl reitsl terisl etrisl treisl rteisl ertisl retisl steril tseril setril estril tesril etsril streil tsreil srteil rsteil trseil rtseil sertil esrtil sretil rsetil erstil restil tersil etrsil tresil rtesil ertsil retsil
Note: these 'words' (valid or invalid) are all the permutations of the word lister. These words are obtained by scrambling the letters in lister.