proign rpoign porign oprign ropign orpign priogn rpiogn pirogn iprogn ripogn irpogn poirgn opirgn piorgn iporgn oiprgn ioprgn roipgn oripgn riopgn iropgn oirpgn iorpgn progin rpogin porgin oprgin ropgin orpgin prgoin rpgoin pgroin gproin rgpoin grpoin pogrin opgrin pgorin gporin ogprin goprin rogpin orgpin rgopin gropin ogrpin gorpin prigon rpigon pirgon iprgon ripgon irpgon prgion rpgion pgrion gprion rgpion grpion pigron ipgron pgiron gpiron igpron gipron rigpon irgpon rgipon gripon igrpon girpon poigrn opigrn piogrn ipogrn oipgrn iopgrn pogirn opgirn pgoirn gpoirn ogpirn gopirn pigorn ipgorn pgiorn gpiorn igporn giporn oigprn iogprn ogiprn goiprn igoprn gioprn roigpn origpn riogpn irogpn oirgpn iorgpn rogipn orgipn rgoipn groipn ogripn goripn rigopn irgopn rgiopn griopn igropn giropn oigrpn iogrpn ogirpn goirpn igorpn giorpn proing rpoing poring opring roping orping priong rpiong pirong iprong ripong irpong poirng opirng piorng iporng oiprng ioprng roipng oripng riopng iropng oirpng iorpng pronig rponig pornig oprnig ropnig orpnig prnoig rpnoig pnroig nproig rnpoig nrpoig ponrig opnrig pnorig nporig onprig noprig ronpig ornpig rnopig nropig onrpig norpig prinog rpinog pirnog iprnog ripnog irpnog prniog rpniog pnriog npriog rnpiog nrpiog pinrog ipnrog pnirog npirog inprog niprog rinpog irnpog rnipog nripog inrpog nirpog poinrg opinrg pionrg iponrg oipnrg iopnrg ponirg opnirg pnoirg npoirg onpirg nopirg pinorg ipnorg pniorg npiorg inporg niporg oinprg ionprg oniprg noiprg inoprg nioprg roinpg orinpg rionpg ironpg oirnpg iornpg ronipg ornipg rnoipg nroipg onripg noripg rinopg irnopg rniopg nriopg inropg niropg oinrpg ionrpg onirpg noirpg inorpg niorpg progni rpogni porgni oprgni ropgni orpgni prgoni rpgoni pgroni gproni rgponi grponi pogrni opgrni pgorni gporni ogprni goprni rogpni orgpni rgopni gropni ogrpni gorpni prongi rpongi porngi oprngi ropngi orpngi prnogi rpnogi pnrogi nprogi rnpogi nrpogi ponrgi opnrgi pnorgi nporgi onprgi noprgi ronpgi ornpgi rnopgi nropgi onrpgi norpgi prgnoi rpgnoi pgrnoi gprnoi rgpnoi grpnoi prngoi rpngoi pnrgoi nprgoi rnpgoi nrpgoi pgnroi gpnroi pngroi npgroi gnproi ngproi rgnpoi grnpoi rngpoi nrgpoi gnrpoi ngrpoi pognri opgnri pgonri gponri ogpnri gopnri pongri opngri pnogri npogri onpgri nopgri pgnori gpnori pngori npgori gnpori ngpori ognpri gonpri ongpri nogpri gnopri ngopri rognpi orgnpi rgonpi gronpi ogrnpi gornpi rongpi orngpi rnogpi nrogpi onrgpi norgpi rgnopi grnopi rngopi nrgopi gnropi ngropi ognrpi gonrpi ongrpi nogrpi gnorpi ngorpi prigno rpigno pirgno iprgno ripgno irpgno prgino rpgino pgrino gprino rgpino grpino pigrno ipgrno pgirno gpirno igprno giprno rigpno irgpno rgipno gripno igrpno girpno pringo rpingo pirngo iprngo ripngo irpngo prnigo rpnigo pnrigo nprigo rnpigo nrpigo pinrgo ipnrgo pnirgo npirgo inprgo niprgo rinpgo irnpgo rnipgo nripgo inrpgo nirpgo prgnio rpgnio pgrnio gprnio rgpnio grpnio prngio rpngio pnrgio nprgio rnpgio nrpgio pgnrio gpnrio pngrio npgrio gnprio ngprio rgnpio grnpio rngpio nrgpio gnrpio ngrpio pignro ipgnro pginro gpinro igpnro gipnro pingro ipngro pnigro npigro inpgro nipgro pgniro gpniro pngiro npgiro gnpiro ngpiro ignpro ginpro ingpro nigpro gnipro ngipro rignpo irgnpo rginpo grinpo igrnpo girnpo ringpo irngpo rnigpo nrigpo inrgpo nirgpo rgnipo grnipo rngipo nrgipo gnripo ngripo ignrpo ginrpo ingrpo nigrpo gnirpo ngirpo poignr opignr piognr ipognr oipgnr iopgnr poginr opginr pgoinr gpoinr ogpinr gopinr pigonr ipgonr pgionr gpionr igponr giponr oigpnr iogpnr ogipnr goipnr igopnr giopnr poingr opingr piongr ipongr oipngr iopngr ponigr opnigr pnoigr npoigr onpigr nopigr pinogr ipnogr pniogr npiogr inpogr nipogr oinpgr ionpgr onipgr noipgr inopgr niopgr pognir opgnir pgonir gponir ogpnir gopnir pongir opngir pnogir npogir onpgir nopgir pgnoir gpnoir pngoir npgoir gnpoir ngpoir ognpir gonpir ongpir nogpir gnopir ngopir pignor ipgnor pginor gpinor igpnor gipnor pingor ipngor pnigor npigor inpgor nipgor pgnior gpnior pngior npgior gnpior ngpior ignpor ginpor ingpor nigpor gnipor ngipor oignpr iognpr oginpr goinpr igonpr gionpr oingpr iongpr onigpr noigpr inogpr niogpr ognipr gonipr ongipr nogipr gnoipr ngoipr ignopr ginopr ingopr nigopr gniopr ngiopr roignp orignp riognp irognp oirgnp iorgnp roginp orginp rgoinp groinp ogrinp gorinp rigonp irgonp rgionp grionp igronp gironp oigrnp iogrnp ogirnp goirnp igornp giornp roingp oringp riongp irongp oirngp iorngp ronigp ornigp rnoigp nroigp onrigp norigp rinogp irnogp rniogp nriogp inrogp nirogp oinrgp ionrgp onirgp noirgp inorgp niorgp rognip orgnip rgonip gronip ogrnip gornip rongip orngip rnogip nrogip onrgip norgip rgnoip grnoip rngoip nrgoip gnroip ngroip ognrip gonrip ongrip nogrip gnorip ngorip rignop irgnop rginop grinop igrnop girnop ringop irngop rnigop nrigop inrgop nirgop rgniop grniop rngiop nrgiop gnriop ngriop ignrop ginrop ingrop nigrop gnirop ngirop oignrp iognrp oginrp goinrp igonrp gionrp oingrp iongrp onigrp noigrp inogrp niogrp ognirp gonirp ongirp nogirp gnoirp ngoirp ignorp ginorp ingorp nigorp gniorp ngiorp
Note: these 'words' (valid or invalid) are all the permutations of the word proign. These words are obtained by scrambling the letters in proign.