purins uprins pruins rpuins urpins rupins puirns upirns piurns ipurns uiprns iuprns priuns rpiuns piruns ipruns ripuns irpuns uripns ruipns uirpns iurpns riupns irupns purnis uprnis prunis rpunis urpnis rupnis punris upnris pnuris npuris unpris nupris prnuis rpnuis pnruis npruis rnpuis nrpuis urnpis runpis unrpis nurpis rnupis nrupis puinrs upinrs piunrs ipunrs uipnrs iupnrs punirs upnirs pnuirs npuirs unpirs nupirs pinurs ipnurs pniurs npiurs inpurs nipurs uinprs iunprs uniprs nuiprs inuprs niuprs prinus rpinus pirnus iprnus ripnus irpnus prnius rpnius pnrius nprius rnpius nrpius pinrus ipnrus pnirus npirus inprus niprus rinpus irnpus rnipus nripus inrpus nirpus urinps ruinps uirnps iurnps riunps irunps urnips runips unrips nurips rnuips nruips uinrps iunrps unirps nuirps inurps niurps rinups irnups rniups nriups inrups nirups purisn uprisn pruisn rpuisn urpisn rupisn puirsn upirsn piursn ipursn uiprsn iuprsn priusn rpiusn pirusn iprusn ripusn irpusn uripsn ruipsn uirpsn iurpsn riupsn irupsn pursin uprsin prusin rpusin urpsin rupsin pusrin upsrin psurin spurin usprin suprin prsuin rpsuin psruin spruin rspuin srpuin urspin ruspin usrpin surpin rsupin srupin puisrn upisrn piusrn ipusrn uipsrn iupsrn pusirn upsirn psuirn spuirn uspirn supirn pisurn ipsurn psiurn spiurn ispurn sipurn uisprn iusprn usiprn suiprn isuprn siuprn prisun rpisun pirsun iprsun ripsun irpsun prsiun rpsiun psriun spriun rspiun srpiun pisrun ipsrun psirun spirun isprun siprun rispun irspun rsipun sripun isrpun sirpun urispn ruispn uirspn iurspn riuspn iruspn ursipn rusipn usripn suripn rsuipn sruipn uisrpn iusrpn usirpn suirpn isurpn siurpn risupn irsupn rsiupn sriupn isrupn sirupn purnsi uprnsi prunsi rpunsi urpnsi rupnsi punrsi upnrsi pnursi npursi unprsi nuprsi prnusi rpnusi pnrusi nprusi rnpusi nrpusi urnpsi runpsi unrpsi nurpsi rnupsi nrupsi pursni uprsni prusni rpusni urpsni rupsni pusrni upsrni psurni spurni usprni suprni prsuni rpsuni psruni spruni rspuni srpuni urspni ruspni usrpni surpni rsupni srupni punsri upnsri pnusri npusri unpsri nupsri pusnri upsnri psunri spunri uspnri supnri pnsuri npsuri psnuri spnuri nspuri snpuri unspri nuspri usnpri sunpri nsupri snupri prnsui rpnsui pnrsui nprsui rnpsui nrpsui prsnui rpsnui psrnui sprnui rspnui srpnui pnsrui npsrui psnrui spnrui nsprui snprui rnspui nrspui rsnpui srnpui nsrpui snrpui urnspi runspi unrspi nurspi rnuspi nruspi ursnpi rusnpi usrnpi surnpi rsunpi srunpi unsrpi nusrpi usnrpi sunrpi nsurpi snurpi rnsupi nrsupi rsnupi srnupi nsrupi snrupi puinsr upinsr piunsr ipunsr uipnsr iupnsr punisr upnisr pnuisr npuisr unpisr nupisr pinusr ipnusr pniusr npiusr inpusr nipusr uinpsr iunpsr unipsr nuipsr inupsr niupsr puisnr upisnr piusnr ipusnr uipsnr iupsnr pusinr upsinr psuinr spuinr uspinr supinr pisunr ipsunr psiunr spiunr ispunr sipunr uispnr iuspnr usipnr suipnr isupnr siupnr punsir upnsir pnusir npusir unpsir nupsir pusnir upsnir psunir spunir uspnir supnir pnsuir npsuir psnuir spnuir nspuir snpuir unspir nuspir usnpir sunpir nsupir snupir pinsur ipnsur pnisur npisur inpsur nipsur pisnur ipsnur psinur spinur ispnur sipnur pnsiur npsiur psniur spniur nspiur snpiur inspur nispur isnpur sinpur nsipur snipur uinspr iunspr unispr nuispr inuspr niuspr uisnpr iusnpr usinpr suinpr isunpr siunpr unsipr nusipr usnipr sunipr nsuipr snuipr insupr nisupr isnupr sinupr nsiupr sniupr prinsu rpinsu pirnsu iprnsu ripnsu irpnsu prnisu rpnisu pnrisu nprisu rnpisu nrpisu pinrsu ipnrsu pnirsu npirsu inprsu niprsu rinpsu irnpsu rnipsu nripsu inrpsu nirpsu prisnu rpisnu pirsnu iprsnu ripsnu irpsnu prsinu rpsinu psrinu sprinu rspinu srpinu pisrnu ipsrnu psirnu spirnu isprnu siprnu rispnu irspnu rsipnu sripnu isrpnu sirpnu prnsiu rpnsiu pnrsiu nprsiu rnpsiu nrpsiu prsniu rpsniu psrniu sprniu rspniu srpniu pnsriu npsriu psnriu spnriu nspriu snpriu rnspiu nrspiu rsnpiu srnpiu nsrpiu snrpiu pinsru ipnsru pnisru npisru inpsru nipsru pisnru ipsnru psinru spinru ispnru sipnru pnsiru npsiru psniru spniru nspiru snpiru inspru nispru isnpru sinpru nsipru snipru rinspu irnspu rnispu nrispu inrspu nirspu risnpu irsnpu rsinpu srinpu isrnpu sirnpu rnsipu nrsipu rsnipu srnipu nsripu snripu insrpu nisrpu isnrpu sinrpu nsirpu snirpu urinsp ruinsp uirnsp iurnsp riunsp irunsp urnisp runisp unrisp nurisp rnuisp nruisp uinrsp iunrsp unirsp nuirsp inursp niursp rinusp irnusp rniusp nriusp inrusp nirusp urisnp ruisnp uirsnp iursnp riusnp irusnp ursinp rusinp usrinp surinp rsuinp sruinp uisrnp iusrnp usirnp suirnp isurnp siurnp risunp irsunp rsiunp sriunp isrunp sirunp urnsip runsip unrsip nursip rnusip nrusip ursnip rusnip usrnip surnip rsunip srunip unsrip nusrip usnrip sunrip nsurip snurip rnsuip nrsuip rsnuip srnuip nsruip snruip uinsrp iunsrp unisrp nuisrp inusrp niusrp uisnrp iusnrp usinrp suinrp isunrp siunrp unsirp nusirp usnirp sunirp nsuirp snuirp insurp nisurp isnurp sinurp nsiurp sniurp rinsup irnsup rnisup nrisup inrsup nirsup risnup irsnup rsinup srinup isrnup sirnup rnsiup nrsiup rsniup srniup nsriup snriup insrup nisrup isnrup sinrup nsirup snirup
Note: these 'words' (valid or invalid) are all the permutations of the word purins. These words are obtained by scrambling the letters in purins.