reruns erruns rreuns rreuns erruns reruns reurns erurns ruerns urerns eurrns uerrns rruens rruens rurens urrens rurens urrens erurns reurns eurrns uerrns ruerns urerns rernus errnus rrenus rrenus errnus rernus renrus ernrus rnerus nrerus enrrus nerrus rrneus rrneus rnreus nrreus rnreus nrreus ernrus renrus enrrus nerrus rnerus nrerus reunrs erunrs ruenrs urenrs eurnrs uernrs renurs ernurs rneurs nreurs enrurs nerurs runers urners rnuers nruers unrers nurers eunrrs uenrrs enurrs neurrs unerrs nuerrs rrunes rrunes rurnes urrnes rurnes urrnes rrnues rrnues rnrues nrrues rnrues nrrues runres urnres rnures nrures unrres nurres runres urnres rnures nrures unrres nurres erunrs reunrs eurnrs uernrs ruenrs urenrs ernurs renurs enrurs nerurs rneurs nreurs eunrrs uenrrs enurrs neurrs unerrs nuerrs runers urners rnuers nruers unrers nurers rerusn errusn rreusn rreusn errusn rerusn reursn erursn ruersn urersn eurrsn uerrsn rruesn rruesn ruresn urresn ruresn urresn erursn reursn eurrsn uerrsn ruersn urersn rersun errsun rresun rresun errsun rersun resrun ersrun rserun srerun esrrun serrun rrseun rrseun rsreun srreun rsreun srreun ersrun resrun esrrun serrun rserun srerun reusrn erusrn ruesrn uresrn eursrn uersrn resurn ersurn rseurn sreurn esrurn serurn rusern ursern rsuern sruern usrern surern eusrrn uesrrn esurrn seurrn userrn suerrn rrusen rrusen rursen urrsen rursen urrsen rrsuen rrsuen rsruen srruen rsruen srruen rusren ursren rsuren sruren usrren surren rusren ursren rsuren sruren usrren surren erusrn reusrn eursrn uersrn ruesrn uresrn ersurn resurn esrurn serurn rseurn sreurn eusrrn uesrrn esurrn seurrn userrn suerrn rusern ursern rsuern sruern usrern surern rernsu errnsu rrensu rrensu errnsu rernsu renrsu ernrsu rnersu nrersu enrrsu nerrsu rrnesu rrnesu rnresu nrresu rnresu nrresu ernrsu renrsu enrrsu nerrsu rnersu nrersu rersnu errsnu rresnu rresnu errsnu rersnu resrnu ersrnu rsernu srernu esrrnu serrnu rrsenu rrsenu rsrenu srrenu rsrenu srrenu ersrnu resrnu esrrnu serrnu rsernu srernu rensru ernsru rnesru nresru enrsru nersru resnru ersnru rsenru srenru esrnru sernru rnseru nrseru rsneru srneru nsreru snreru ensrru nesrru esnrru senrru nserru snerru rrnseu rrnseu rnrseu nrrseu rnrseu nrrseu rrsneu rrsneu rsrneu srrneu rsrneu srrneu rnsreu nrsreu rsnreu srnreu nsrreu snrreu rnsreu nrsreu rsnreu srnreu nsrreu snrreu ernsru rensru enrsru nersru rnesru nresru ersnru resnru esrnru sernru rsenru srenru ensrru nesrru esnrru senrru nserru snerru rnseru nrseru rsneru srneru nsreru snreru reunsr erunsr ruensr urensr eurnsr uernsr renusr ernusr rneusr nreusr enrusr nerusr runesr urnesr rnuesr nruesr unresr nuresr eunrsr uenrsr enursr neursr unersr nuersr reusnr erusnr ruesnr uresnr eursnr uersnr resunr ersunr rseunr sreunr esrunr serunr rusenr ursenr rsuenr sruenr usrenr surenr eusrnr uesrnr esurnr seurnr usernr suernr rensur ernsur rnesur nresur enrsur nersur resnur ersnur rsenur srenur esrnur sernur rnseur nrseur rsneur srneur nsreur snreur ensrur nesrur esnrur senrur nserur snerur runser urnser rnuser nruser unrser nurser rusner ursner rsuner sruner usrner surner rnsuer nrsuer rsnuer srnuer nsruer snruer unsrer nusrer usnrer sunrer nsurer snurer eunsrr uensrr enusrr neusrr unesrr nuesrr eusnrr uesnrr esunrr seunrr usenrr suenrr ensurr nesurr esnurr senurr nseurr sneurr unserr nuserr usnerr sunerr nsuerr snuerr rrunse rrunse rurnse urrnse rurnse urrnse rrnuse rrnuse rnruse nrruse rnruse nrruse runrse urnrse rnurse nrurse unrrse nurrse runrse urnrse rnurse nrurse unrrse nurrse rrusne rrusne rursne urrsne rursne urrsne rrsune rrsune rsrune srrune rsrune srrune rusrne ursrne rsurne srurne usrrne surrne rusrne ursrne rsurne srurne usrrne surrne rrnsue rrnsue rnrsue nrrsue rnrsue nrrsue rrsnue rrsnue rsrnue srrnue rsrnue srrnue rnsrue nrsrue rsnrue srnrue nsrrue snrrue rnsrue nrsrue rsnrue srnrue nsrrue snrrue runsre urnsre rnusre nrusre unrsre nursre rusnre ursnre rsunre srunre usrnre surnre rnsure nrsure rsnure srnure nsrure snrure unsrre nusrre usnrre sunrre nsurre snurre runsre urnsre rnusre nrusre unrsre nursre rusnre ursnre rsunre srunre usrnre surnre rnsure nrsure rsnure srnure nsrure snrure unsrre nusrre usnrre sunrre nsurre snurre erunsr reunsr eurnsr uernsr ruensr urensr ernusr renusr enrusr nerusr rneusr nreusr eunrsr uenrsr enursr neursr unersr nuersr runesr urnesr rnuesr nruesr unresr nuresr erusnr reusnr eursnr uersnr ruesnr uresnr ersunr resunr esrunr serunr rseunr sreunr eusrnr uesrnr esurnr seurnr usernr suernr rusenr ursenr rsuenr sruenr usrenr surenr ernsur rensur enrsur nersur rnesur nresur ersnur resnur esrnur sernur rsenur srenur ensrur nesrur esnrur senrur nserur snerur rnseur nrseur rsneur srneur nsreur snreur eunsrr uensrr enusrr neusrr unesrr nuesrr eusnrr uesnrr esunrr seunrr usenrr suenrr ensurr nesurr esnurr senurr nseurr sneurr unserr nuserr usnerr sunerr nsuerr snuerr runser urnser rnuser nruser unrser nurser rusner ursner rsuner sruner usrner surner rnsuer nrsuer rsnuer srnuer nsruer snruer unsrer nusrer usnrer sunrer nsurer snurer
Note: these 'words' (valid or invalid) are all the permutations of the word reruns. These words are obtained by scrambling the letters in reruns.