proins rpoins porins oprins ropins orpins prions rpions pirons iprons ripons irpons poirns opirns piorns iporns oiprns ioprns roipns oripns riopns iropns oirpns iorpns pronis rponis pornis oprnis ropnis orpnis prnois rpnois pnrois nprois rnpois nrpois ponris opnris pnoris nporis onpris nopris ronpis ornpis rnopis nropis onrpis norpis prinos rpinos pirnos iprnos ripnos irpnos prnios rpnios pnrios nprios rnpios nrpios pinros ipnros pniros npiros inpros nipros rinpos irnpos rnipos nripos inrpos nirpos poinrs opinrs pionrs iponrs oipnrs iopnrs ponirs opnirs pnoirs npoirs onpirs nopirs pinors ipnors pniors npiors inpors nipors oinprs ionprs oniprs noiprs inoprs nioprs roinps orinps rionps ironps oirnps iornps ronips ornips rnoips nroips onrips norips rinops irnops rniops nriops inrops nirops oinrps ionrps onirps noirps inorps niorps proisn rpoisn porisn oprisn ropisn orpisn priosn rpiosn pirosn iprosn riposn irposn poirsn opirsn piorsn iporsn oiprsn ioprsn roipsn oripsn riopsn iropsn oirpsn iorpsn prosin rposin porsin oprsin ropsin orpsin prsoin rpsoin psroin sproin rspoin srpoin posrin opsrin psorin sporin osprin soprin rospin orspin rsopin sropin osrpin sorpin prison rpison pirson iprson ripson irpson prsion rpsion psrion sprion rspion srpion pisron ipsron psiron spiron ispron sipron rispon irspon rsipon sripon isrpon sirpon poisrn opisrn piosrn iposrn oipsrn iopsrn posirn opsirn psoirn spoirn ospirn sopirn pisorn ipsorn psiorn spiorn isporn siporn oisprn iosprn osiprn soiprn isoprn sioprn roispn orispn riospn irospn oirspn iorspn rosipn orsipn rsoipn sroipn osripn soripn risopn irsopn rsiopn sriopn isropn siropn oisrpn iosrpn osirpn soirpn isorpn siorpn pronsi rponsi pornsi oprnsi ropnsi orpnsi prnosi rpnosi pnrosi nprosi rnposi nrposi ponrsi opnrsi pnorsi nporsi onprsi noprsi ronpsi ornpsi rnopsi nropsi onrpsi norpsi prosni rposni porsni oprsni ropsni orpsni prsoni rpsoni psroni sproni rsponi srponi posrni opsrni psorni sporni osprni soprni rospni orspni rsopni sropni osrpni sorpni prnsoi rpnsoi pnrsoi nprsoi rnpsoi nrpsoi prsnoi rpsnoi psrnoi sprnoi rspnoi srpnoi pnsroi npsroi psnroi spnroi nsproi snproi rnspoi nrspoi rsnpoi srnpoi nsrpoi snrpoi ponsri opnsri pnosri nposri onpsri nopsri posnri opsnri psonri sponri ospnri sopnri pnsori npsori psnori spnori nspori snpori onspri nospri osnpri sonpri nsopri snopri ronspi ornspi rnospi nrospi onrspi norspi rosnpi orsnpi rsonpi sronpi osrnpi sornpi rnsopi nrsopi rsnopi srnopi nsropi snropi onsrpi nosrpi osnrpi sonrpi nsorpi snorpi prinso rpinso pirnso iprnso ripnso irpnso prniso rpniso pnriso npriso rnpiso nrpiso pinrso ipnrso pnirso npirso inprso niprso rinpso irnpso rnipso nripso inrpso nirpso prisno rpisno pirsno iprsno ripsno irpsno prsino rpsino psrino sprino rspino srpino pisrno ipsrno psirno spirno isprno siprno rispno irspno rsipno sripno isrpno sirpno prnsio rpnsio pnrsio nprsio rnpsio nrpsio prsnio rpsnio psrnio sprnio rspnio srpnio pnsrio npsrio psnrio spnrio nsprio snprio rnspio nrspio rsnpio srnpio nsrpio snrpio pinsro ipnsro pnisro npisro inpsro nipsro pisnro ipsnro psinro spinro ispnro sipnro pnsiro npsiro psniro spniro nspiro snpiro inspro nispro isnpro sinpro nsipro snipro rinspo irnspo rnispo nrispo inrspo nirspo risnpo irsnpo rsinpo srinpo isrnpo sirnpo rnsipo nrsipo rsnipo srnipo nsripo snripo insrpo nisrpo isnrpo sinrpo nsirpo snirpo poinsr opinsr pionsr iponsr oipnsr iopnsr ponisr opnisr pnoisr npoisr onpisr nopisr pinosr ipnosr pniosr npiosr inposr niposr oinpsr ionpsr onipsr noipsr inopsr niopsr poisnr opisnr piosnr iposnr oipsnr iopsnr posinr opsinr psoinr spoinr ospinr sopinr pisonr ipsonr psionr spionr isponr siponr oispnr iospnr osipnr soipnr isopnr siopnr ponsir opnsir pnosir nposir onpsir nopsir posnir opsnir psonir sponir ospnir sopnir pnsoir npsoir psnoir spnoir nspoir snpoir onspir nospir osnpir sonpir nsopir snopir pinsor ipnsor pnisor npisor inpsor nipsor pisnor ipsnor psinor spinor ispnor sipnor pnsior npsior psnior spnior nspior snpior inspor nispor isnpor sinpor nsipor snipor oinspr ionspr onispr noispr inospr niospr oisnpr iosnpr osinpr soinpr isonpr sionpr onsipr nosipr osnipr sonipr nsoipr snoipr insopr nisopr isnopr sinopr nsiopr sniopr roinsp orinsp rionsp ironsp oirnsp iornsp ronisp ornisp rnoisp nroisp onrisp norisp rinosp irnosp rniosp nriosp inrosp nirosp oinrsp ionrsp onirsp noirsp inorsp niorsp roisnp orisnp riosnp irosnp oirsnp iorsnp rosinp orsinp rsoinp sroinp osrinp sorinp risonp irsonp rsionp srionp isronp sironp oisrnp iosrnp osirnp soirnp isornp siornp ronsip ornsip rnosip nrosip onrsip norsip rosnip orsnip rsonip sronip osrnip sornip rnsoip nrsoip rsnoip srnoip nsroip snroip onsrip nosrip osnrip sonrip nsorip snorip rinsop irnsop rnisop nrisop inrsop nirsop risnop irsnop rsinop srinop isrnop sirnop rnsiop nrsiop rsniop srniop nsriop snriop insrop nisrop isnrop sinrop nsirop snirop oinsrp ionsrp onisrp noisrp inosrp niosrp oisnrp iosnrp osinrp soinrp isonrp sionrp onsirp nosirp osnirp sonirp nsoirp snoirp insorp nisorp isnorp sinorp nsiorp sniorp
Note: these 'words' (valid or invalid) are all the permutations of the word proins. These words are obtained by scrambling the letters in proins.