pinger ipnger pniger npiger inpger nipger pigner ipgner pginer gpiner igpner gipner pngier npgier pgnier gpnier ngpier gnpier ingper nigper ignper ginper ngiper gniper pinegr ipnegr pniegr npiegr inpegr nipegr piengr ipengr peingr epingr iepngr eipngr pneigr npeigr penigr epnigr nepigr enpigr inepgr niepgr ienpgr einpgr neipgr enipgr pigenr ipgenr pgienr gpienr igpenr gipenr piegnr ipegnr peignr epignr iepgnr eipgnr pgeinr gpeinr peginr epginr gepinr egpinr igepnr giepnr iegpnr eigpnr geipnr egipnr pngeir npgeir pgneir gpneir ngpeir gnpeir pnegir npegir pengir epngir nepgir enpgir pgenir gpenir pegnir epgnir gepnir egpnir ngepir gnepir negpir engpir genpir egnpir ingepr nigepr ignepr ginepr ngiepr gniepr inegpr niegpr iengpr eingpr neigpr enigpr igenpr gienpr iegnpr eignpr geinpr eginpr ngeipr gneipr negipr engipr genipr egnipr pingre ipngre pnigre npigre inpgre nipgre pignre ipgnre pginre gpinre igpnre gipnre pngire npgire pgnire gpnire ngpire gnpire ingpre nigpre ignpre ginpre ngipre gnipre pinrge ipnrge pnirge npirge inprge niprge pirnge iprnge pringe rpinge irpnge ripnge pnrige nprige prnige rpnige nrpige rnpige inrpge nirpge irnpge rinpge nripge rnipge pigrne ipgrne pgirne gpirne igprne giprne pirgne iprgne prigne rpigne irpgne ripgne pgrine gprine prgine rpgine grpine rgpine igrpne girpne irgpne rigpne gripne rgipne pngrie npgrie pgnrie gpnrie ngprie gnprie pnrgie nprgie prngie rpngie nrpgie rnpgie pgrnie gprnie prgnie rpgnie grpnie rgpnie ngrpie gnrpie nrgpie rngpie grnpie rgnpie ingrpe nigrpe ignrpe ginrpe ngirpe gnirpe inrgpe nirgpe irngpe ringpe nrigpe rnigpe igrnpe girnpe irgnpe rignpe grinpe rginpe ngripe gnripe nrgipe rngipe grnipe rgnipe pinerg ipnerg pnierg npierg inperg niperg pienrg ipenrg peinrg epinrg iepnrg eipnrg pneirg npeirg penirg epnirg nepirg enpirg ineprg nieprg ienprg einprg neiprg eniprg pinreg ipnreg pnireg npireg inpreg nipreg pirneg iprneg prineg rpineg irpneg ripneg pnrieg nprieg prnieg rpnieg nrpieg rnpieg inrpeg nirpeg irnpeg rinpeg nripeg rnipeg pierng iperng peirng epirng ieprng eiprng pireng ipreng prieng rpieng irpeng ripeng pering epring preing rpeing erping reping ierpng eirpng irepng riepng eripng reipng pnerig nperig penrig epnrig neprig enprig pnreig npreig prneig rpneig nrpeig rnpeig pernig eprnig prenig rpenig erpnig repnig nerpig enrpig nrepig rnepig ernpig renpig inerpg nierpg ienrpg einrpg neirpg enirpg inrepg nirepg irnepg rinepg nriepg rniepg iernpg eirnpg irenpg rienpg erinpg reinpg neripg enripg nreipg rneipg ernipg renipg pigern ipgern pgiern gpiern igpern gipern piegrn ipegrn peigrn epigrn iepgrn eipgrn pgeirn gpeirn pegirn epgirn gepirn egpirn igeprn gieprn iegprn eigprn geiprn egiprn pigren ipgren pgiren gpiren igpren gipren pirgen iprgen prigen rpigen irpgen ripgen pgrien gprien prgien rpgien grpien rgpien igrpen girpen irgpen rigpen gripen rgipen piergn ipergn peirgn epirgn ieprgn eiprgn piregn ipregn priegn rpiegn irpegn ripegn perign eprign preign rpeign erpign repign ierpgn eirpgn irepgn riepgn eripgn reipgn pgerin gperin pegrin epgrin geprin egprin pgrein gprein prgein rpgein grpein rgpein pergin eprgin pregin rpegin erpgin repgin gerpin egrpin grepin rgepin ergpin regpin igerpn gierpn iegrpn eigrpn geirpn egirpn igrepn girepn irgepn rigepn griepn rgiepn iergpn eirgpn iregpn riegpn erigpn reigpn geripn egripn greipn rgeipn ergipn regipn pngeri npgeri pgneri gpneri ngperi gnperi pnegri npegri pengri epngri nepgri enpgri pgenri gpenri pegnri epgnri gepnri egpnri ngepri gnepri negpri engpri genpri egnpri pngrei npgrei pgnrei gpnrei ngprei gnprei pnrgei nprgei prngei rpngei nrpgei rnpgei pgrnei gprnei prgnei rpgnei grpnei rgpnei ngrpei gnrpei nrgpei rngpei grnpei rgnpei pnergi npergi penrgi epnrgi neprgi enprgi pnregi npregi prnegi rpnegi nrpegi rnpegi perngi eprngi prengi rpengi erpngi repngi nerpgi enrpgi nrepgi rnepgi ernpgi renpgi pgerni gperni pegrni epgrni geprni egprni pgreni gpreni prgeni rpgeni grpeni rgpeni pergni eprgni pregni rpegni erpgni repgni gerpni egrpni grepni rgepni ergpni regpni ngerpi gnerpi negrpi engrpi genrpi egnrpi ngrepi gnrepi nrgepi rngepi grnepi rgnepi nergpi enrgpi nregpi rnegpi erngpi rengpi gernpi egrnpi grenpi rgenpi ergnpi regnpi ingerp nigerp ignerp ginerp ngierp gnierp inegrp niegrp iengrp eingrp neigrp enigrp igenrp gienrp iegnrp eignrp geinrp eginrp ngeirp gneirp negirp engirp genirp egnirp ingrep nigrep ignrep ginrep ngirep gnirep inrgep nirgep irngep ringep nrigep rnigep igrnep girnep irgnep rignep grinep rginep ngriep gnriep nrgiep rngiep grniep rgniep inergp niergp ienrgp einrgp neirgp enirgp inregp niregp irnegp rinegp nriegp rniegp ierngp eirngp irengp riengp eringp reingp nerigp enrigp nreigp rneigp ernigp renigp igernp giernp iegrnp eigrnp geirnp egirnp igrenp girenp irgenp rigenp grienp rgienp iergnp eirgnp iregnp riegnp erignp reignp gerinp egrinp greinp rgeinp erginp reginp ngerip gnerip negrip engrip genrip egnrip ngreip gnreip nrgeip rngeip grneip rgneip nergip enrgip nregip rnegip erngip rengip gernip egrnip grenip rgenip ergnip regnip
Note: these 'words' (valid or invalid) are all the permutations of the word pinger. These words are obtained by scrambling the letters in pinger.