upends puends uepnds eupnds peunds epunds upneds puneds unpeds nupeds pnueds npueds uenpds eunpds unepds nuepds enupds neupds penuds epnuds pneuds npeuds enpuds nepuds upedns puedns uepdns eupdns peudns epudns updens pudens udpens dupens pduens dpuens uedpns eudpns udepns duepns edupns deupns peduns epduns pdeuns dpeuns edpuns depuns upndes pundes unpdes nupdes pnudes npudes updnes pudnes udpnes dupnes pdunes dpunes undpes nudpes udnpes dunpes ndupes dnupes pndues npdues pdnues dpnues ndpues dnpues uendps eundps unedps nuedps enudps neudps uednps eudnps udenps duenps edunps deunps undeps nudeps udneps duneps ndueps dnueps endups nedups ednups denups ndeups dneups pendus epndus pnedus npedus enpdus nepdus pednus epdnus pdenus dpenus edpnus depnus pndeus npdeus pdneus dpneus ndpeus dnpeus endpus nedpus ednpus denpus ndepus dnepus upensd puensd uepnsd eupnsd peunsd epunsd upnesd punesd unpesd nupesd pnuesd npuesd uenpsd eunpsd unepsd nuepsd enupsd neupsd penusd epnusd pneusd npeusd enpusd nepusd upesnd puesnd uepsnd eupsnd peusnd epusnd upsend pusend uspend supend psuend spuend uespnd euspnd usepnd suepnd esupnd seupnd pesund epsund pseund speund espund sepund upnsed punsed unpsed nupsed pnused npused upsned pusned uspned supned psuned spuned unsped nusped usnped sunped nsuped snuped pnsued npsued psnued spnued nspued snpued uenspd eunspd unespd nuespd enuspd neuspd uesnpd eusnpd usenpd suenpd esunpd seunpd unsepd nusepd usnepd sunepd nsuepd snuepd ensupd nesupd esnupd senupd nseupd sneupd pensud epnsud pnesud npesud enpsud nepsud pesnud epsnud psenud spenud espnud sepnud pnseud npseud psneud spneud nspeud snpeud enspud nespud esnpud senpud nsepud snepud upedsn puedsn uepdsn eupdsn peudsn epudsn updesn pudesn udpesn dupesn pduesn dpuesn uedpsn eudpsn udepsn duepsn edupsn deupsn pedusn epdusn pdeusn dpeusn edpusn depusn upesdn puesdn uepsdn eupsdn peusdn epusdn upsedn pusedn uspedn supedn psuedn spuedn uespdn euspdn usepdn suepdn esupdn seupdn pesudn epsudn pseudn speudn espudn sepudn updsen pudsen udpsen dupsen pdusen dpusen upsden pusden uspden supden psuden spuden udspen duspen usdpen sudpen dsupen sdupen pdsuen dpsuen psduen spduen dspuen sdpuen uedspn eudspn udespn duespn eduspn deuspn uesdpn eusdpn usedpn suedpn esudpn seudpn udsepn dusepn usdepn sudepn dsuepn sduepn edsupn desupn esdupn sedupn dseupn sdeupn pedsun epdsun pdesun dpesun edpsun depsun pesdun epsdun psedun spedun espdun sepdun pdseun dpseun psdeun spdeun dspeun sdpeun edspun despun esdpun sedpun dsepun sdepun upndse pundse unpdse nupdse pnudse npudse updnse pudnse udpnse dupnse pdunse dpunse undpse nudpse udnpse dunpse ndupse dnupse pnduse npduse pdnuse dpnuse ndpuse dnpuse upnsde punsde unpsde nupsde pnusde npusde upsnde pusnde uspnde supnde psunde spunde unspde nuspde usnpde sunpde nsupde snupde pnsude npsude psnude spnude nspude snpude updsne pudsne udpsne dupsne pdusne dpusne upsdne pusdne uspdne supdne psudne spudne udspne duspne usdpne sudpne dsupne sdupne pdsune dpsune psdune spdune dspune sdpune undspe nudspe udnspe dunspe nduspe dnuspe unsdpe nusdpe usndpe sundpe nsudpe snudpe udsnpe dusnpe usdnpe sudnpe dsunpe sdunpe ndsupe dnsupe nsdupe sndupe dsnupe sdnupe pndsue npdsue pdnsue dpnsue ndpsue dnpsue pnsdue npsdue psndue spndue nspdue snpdue pdsnue dpsnue psdnue spdnue dspnue sdpnue ndspue dnspue nsdpue sndpue dsnpue sdnpue uendsp eundsp unedsp nuedsp enudsp neudsp uednsp eudnsp udensp duensp edunsp deunsp undesp nudesp udnesp dunesp nduesp dnuesp endusp nedusp ednusp denusp ndeusp dneusp uensdp eunsdp unesdp nuesdp enusdp neusdp uesndp eusndp usendp suendp esundp seundp unsedp nusedp usnedp sunedp nsuedp snuedp ensudp nesudp esnudp senudp nseudp sneudp uedsnp eudsnp udesnp duesnp edusnp deusnp uesdnp eusdnp usednp suednp esudnp seudnp udsenp dusenp usdenp sudenp dsuenp sduenp edsunp desunp esdunp sedunp dseunp sdeunp undsep nudsep udnsep dunsep ndusep dnusep unsdep nusdep usndep sundep nsudep snudep udsnep dusnep usdnep sudnep dsunep sdunep ndsuep dnsuep nsduep snduep dsnuep sdnuep endsup nedsup ednsup densup ndesup dnesup ensdup nesdup esndup sendup nsedup snedup edsnup desnup esdnup sednup dsenup sdenup ndseup dnseup nsdeup sndeup dsneup sdneup pendsu epndsu pnedsu npedsu enpdsu nepdsu pednsu epdnsu pdensu dpensu edpnsu depnsu pndesu npdesu pdnesu dpnesu ndpesu dnpesu endpsu nedpsu ednpsu denpsu ndepsu dnepsu pensdu epnsdu pnesdu npesdu enpsdu nepsdu pesndu epsndu psendu spendu espndu sepndu pnsedu npsedu psnedu spnedu nspedu snpedu enspdu nespdu esnpdu senpdu nsepdu snepdu pedsnu epdsnu pdesnu dpesnu edpsnu depsnu pesdnu epsdnu psednu spednu espdnu sepdnu pdsenu dpsenu psdenu spdenu dspenu sdpenu edspnu despnu esdpnu sedpnu dsepnu sdepnu pndseu npdseu pdnseu dpnseu ndpseu dnpseu pnsdeu npsdeu psndeu spndeu nspdeu snpdeu pdsneu dpsneu psdneu spdneu dspneu sdpneu ndspeu dnspeu nsdpeu sndpeu dsnpeu sdnpeu endspu nedspu ednspu denspu ndespu dnespu ensdpu nesdpu esndpu sendpu nsedpu snedpu edsnpu desnpu esdnpu sednpu dsenpu sdenpu ndsepu dnsepu nsdepu sndepu dsnepu sdnepu
Note: these 'words' (valid or invalid) are all the permutations of the word upends. These words are obtained by scrambling the letters in upends.