prenup rpenup pernup eprnup repnup erpnup prneup rpneup pnreup npreup rnpeup nrpeup penrup epnrup pnerup nperup enprup neprup renpup ernpup rnepup nrepup enrpup nerpup preunp rpeunp perunp eprunp repunp erpunp pruenp rpuenp purenp uprenp rupenp urpenp peurnp epurnp puernp upernp euprnp ueprnp reupnp erupnp ruepnp urepnp eurpnp uerpnp prnuep rpnuep pnruep npruep rnpuep nrpuep prunep rpunep purnep uprnep rupnep urpnep pnurep npurep punrep upnrep nuprep unprep rnupep nrupep runpep urnpep nurpep unrpep penurp epnurp pneurp npeurp enpurp nepurp peunrp epunrp puenrp upenrp eupnrp uepnrp pnuerp npuerp punerp upnerp nuperp unperp enuprp neuprp eunprp uenprp nueprp uneprp renupp ernupp rneupp nreupp enrupp nerupp reunpp erunpp ruenpp urenpp eurnpp uernpp rnuepp nruepp runepp urnepp nurepp unrepp enurpp neurpp eunrpp uenrpp nuerpp unerpp prenpu rpenpu pernpu eprnpu repnpu erpnpu prnepu rpnepu pnrepu nprepu rnpepu nrpepu penrpu epnrpu pnerpu nperpu enprpu neprpu renppu ernppu rneppu nreppu enrppu nerppu prepnu rpepnu perpnu eprpnu reppnu erppnu prpenu rppenu pprenu pprenu rppenu prpenu peprnu epprnu ppernu ppernu epprnu peprnu reppnu erppnu rpepnu prepnu eprpnu perpnu prnpeu rpnpeu pnrpeu nprpeu rnppeu nrppeu prpneu rppneu pprneu pprneu rppneu prpneu pnpreu nppreu ppnreu ppnreu nppreu pnpreu rnppeu nrppeu rpnpeu prnpeu nprpeu pnrpeu penpru epnpru pnepru npepru enppru neppru pepnru eppnru ppenru ppenru eppnru pepnru pnperu npperu ppneru ppneru npperu pnperu enppru neppru epnpru penpru npepru pnepru renppu ernppu rneppu nreppu enrppu nerppu repnpu erpnpu rpenpu prenpu eprnpu pernpu rnpepu nrpepu rpnepu prnepu nprepu pnrepu enprpu neprpu epnrpu penrpu nperpu pnerpu preupn rpeupn perupn eprupn repupn erpupn pruepn rpuepn purepn uprepn rupepn urpepn peurpn epurpn puerpn uperpn euprpn ueprpn reuppn eruppn rueppn ureppn eurppn uerppn prepun rpepun perpun eprpun reppun erppun prpeun rppeun ppreun ppreun rppeun prpeun peprun epprun pperun pperun epprun peprun reppun erppun rpepun prepun eprpun perpun prupen rpupen purpen uprpen ruppen urppen prpuen rppuen ppruen ppruen rppuen prpuen pupren uppren ppuren ppuren uppren pupren ruppen urppen rpupen prupen uprpen purpen peuprn epuprn pueprn upeprn eupprn uepprn pepurn eppurn ppeurn ppeurn eppurn pepurn pupern uppern ppuern ppuern uppern pupern eupprn uepprn epuprn peuprn upeprn pueprn reuppn eruppn rueppn ureppn eurppn uerppn repupn erpupn rpeupn preupn eprupn perupn rupepn urpepn rpuepn pruepn uprepn purepn euprpn ueprpn epurpn peurpn uperpn puerpn prnupe rpnupe pnrupe nprupe rnpupe nrpupe prunpe rpunpe purnpe uprnpe rupnpe urpnpe pnurpe npurpe punrpe upnrpe nuprpe unprpe rnuppe nruppe runppe urnppe nurppe unrppe prnpue rpnpue pnrpue nprpue rnppue nrppue prpnue rppnue pprnue pprnue rppnue prpnue pnprue npprue ppnrue ppnrue npprue pnprue rnppue nrppue rpnpue prnpue nprpue pnrpue prupne rpupne purpne uprpne ruppne urppne prpune rppune pprune pprune rppune prpune puprne upprne ppurne ppurne upprne puprne ruppne urppne rpupne prupne uprpne purpne pnupre npupre punpre upnpre nuppre unppre pnpure nppure ppnure ppnure nppure pnpure pupnre uppnre ppunre ppunre uppnre pupnre nuppre unppre npupre pnupre upnpre punpre rnuppe nruppe runppe urnppe nurppe unrppe rnpupe nrpupe rpnupe prnupe nprupe pnrupe rupnpe urpnpe rpunpe prunpe uprnpe purnpe nuprpe unprpe npurpe pnurpe upnrpe punrpe penupr epnupr pneupr npeupr enpupr nepupr peunpr epunpr puenpr upenpr eupnpr uepnpr pnuepr npuepr punepr upnepr nupepr unpepr enuppr neuppr eunppr uenppr nueppr uneppr penpur epnpur pnepur npepur enppur neppur pepnur eppnur ppenur ppenur eppnur pepnur pnpeur nppeur ppneur ppneur nppeur pnpeur enppur neppur epnpur penpur npepur pnepur peupnr epupnr puepnr upepnr euppnr ueppnr pepunr eppunr ppeunr ppeunr eppunr pepunr pupenr uppenr ppuenr ppuenr uppenr pupenr euppnr ueppnr epupnr peupnr upepnr puepnr pnuper npuper punper upnper nupper unpper pnpuer nppuer ppnuer ppnuer nppuer pnpuer pupner uppner ppuner ppuner uppner pupner nupper unpper npuper pnuper upnper punper enuppr neuppr eunppr uenppr nueppr uneppr enpupr nepupr epnupr penupr npeupr pneupr eupnpr uepnpr epunpr peunpr upenpr puenpr nupepr unpepr npuepr pnuepr upnepr punepr renupp ernupp rneupp nreupp enrupp nerupp reunpp erunpp ruenpp urenpp eurnpp uernpp rnuepp nruepp runepp urnepp nurepp unrepp enurpp neurpp eunrpp uenrpp nuerpp unerpp renpup ernpup rnepup nrepup enrpup nerpup repnup erpnup rpenup prenup eprnup pernup rnpeup nrpeup rpneup prneup npreup pnreup enprup neprup epnrup penrup nperup pnerup reupnp erupnp ruepnp urepnp eurpnp uerpnp repunp erpunp rpeunp preunp eprunp perunp rupenp urpenp rpuenp pruenp uprenp purenp euprnp ueprnp epurnp peurnp upernp puernp rnupep nrupep runpep urnpep nurpep unrpep rnpuep nrpuep rpnuep prnuep npruep pnruep rupnep urpnep rpunep prunep uprnep purnep nuprep unprep npurep pnurep upnrep punrep enuprp neuprp eunprp uenprp nueprp uneprp enpurp nepurp epnurp penurp npeurp pneurp eupnrp uepnrp epunrp peunrp upenrp puenrp nuperp unperp npuerp pnuerp upnerp punerp
Note: these 'words' (valid or invalid) are all the permutations of the word prenup. These words are obtained by scrambling the letters in prenup.