renigs ernigs rneigs nreigs enrigs nerigs reings erings riengs irengs eirngs ierngs rniegs nriegs rinegs irnegs niregs inregs enirgs neirgs einrgs ienrgs niergs inergs rengis erngis rnegis nregis enrgis nergis regnis ergnis rgenis grenis egrnis gernis rngeis nrgeis rgneis grneis ngreis gnreis engris negris egnris genris ngeris gneris reigns erigns riegns iregns eirgns iergns regins ergins rgeins greins egrins gerins rigens irgens rgiens griens igrens girens eigrns iegrns egirns geirns igerns gierns rniges nriges ringes irnges nirges inrges rngies nrgies rgnies grnies ngries gnries rignes irgnes rgines grines igrnes girnes nigres ingres ngires gnires ignres ginres enigrs neigrs eingrs iengrs niegrs inegrs engirs negirs egnirs genirs ngeirs gneirs eignrs iegnrs eginrs geinrs igenrs gienrs nigers ingers ngiers gniers igners giners renisg ernisg rneisg nreisg enrisg nerisg reinsg erinsg riensg irensg eirnsg iernsg rniesg nriesg rinesg irnesg niresg inresg enirsg neirsg einrsg ienrsg niersg inersg rensig ernsig rnesig nresig enrsig nersig resnig ersnig rsenig srenig esrnig sernig rnseig nrseig rsneig srneig nsreig snreig ensrig nesrig esnrig senrig nserig snerig reisng erisng riesng iresng eirsng iersng resing ersing rseing sreing esring sering riseng irseng rsieng srieng isreng sireng eisrng iesrng esirng seirng iserng sierng rniseg nriseg rinseg irnseg nirseg inrseg rnsieg nrsieg rsnieg srnieg nsrieg snrieg risneg irsneg rsineg srineg isrneg sirneg nisreg insreg nsireg snireg isnreg sinreg enisrg neisrg einsrg iensrg niesrg inesrg ensirg nesirg esnirg senirg nseirg sneirg eisnrg iesnrg esinrg seinrg isenrg sienrg niserg inserg nsierg snierg isnerg sinerg rengsi erngsi rnegsi nregsi enrgsi nergsi regnsi ergnsi rgensi grensi egrnsi gernsi rngesi nrgesi rgnesi grnesi ngresi gnresi engrsi negrsi egnrsi genrsi ngersi gnersi rensgi ernsgi rnesgi nresgi enrsgi nersgi resngi ersngi rsengi srengi esrngi serngi rnsegi nrsegi rsnegi srnegi nsregi snregi ensrgi nesrgi esnrgi senrgi nsergi snergi regsni ergsni rgesni gresni egrsni gersni resgni ersgni rsegni sregni esrgni sergni rgseni grseni rsgeni srgeni gsreni sgreni egsrni gesrni esgrni segrni gserni sgerni rngsei nrgsei rgnsei grnsei ngrsei gnrsei rnsgei nrsgei rsngei srngei nsrgei snrgei rgsnei grsnei rsgnei srgnei gsrnei sgrnei ngsrei gnsrei nsgrei sngrei gsnrei sgnrei engsri negsri egnsri gensri ngesri gnesri ensgri nesgri esngri sengri nsegri snegri egsnri gesnri esgnri segnri gsenri sgenri ngseri gnseri nsgeri sngeri gsneri sgneri reigsn erigsn riegsn iregsn eirgsn iergsn regisn ergisn rgeisn greisn egrisn gerisn rigesn irgesn rgiesn griesn igresn giresn eigrsn iegrsn egirsn geirsn igersn giersn reisgn erisgn riesgn iresgn eirsgn iersgn resign ersign rseign sreign esrign serign risegn irsegn rsiegn sriegn isregn siregn eisrgn iesrgn esirgn seirgn isergn siergn regsin ergsin rgesin gresin egrsin gersin resgin ersgin rsegin sregin esrgin sergin rgsein grsein rsgein srgein gsrein sgrein egsrin gesrin esgrin segrin gserin sgerin rigsen irgsen rgisen grisen igrsen girsen risgen irsgen rsigen srigen isrgen sirgen rgsien grsien rsgien srgien gsrien sgrien igsren gisren isgren sigren gsiren sgiren eigsrn iegsrn egisrn geisrn igesrn giesrn eisgrn iesgrn esigrn seigrn isegrn siegrn egsirn gesirn esgirn segirn gseirn sgeirn igsern gisern isgern sigern gsiern sgiern rnigse nrigse ringse irngse nirgse inrgse rngise nrgise rgnise grnise ngrise gnrise rignse irgnse rginse grinse igrnse girnse nigrse ingrse ngirse gnirse ignrse ginrse rnisge nrisge rinsge irnsge nirsge inrsge rnsige nrsige rsnige srnige nsrige snrige risnge irsnge rsinge sringe isrnge sirnge nisrge insrge nsirge snirge isnrge sinrge rngsie nrgsie rgnsie grnsie ngrsie gnrsie rnsgie nrsgie rsngie srngie nsrgie snrgie rgsnie grsnie rsgnie srgnie gsrnie sgrnie ngsrie gnsrie nsgrie sngrie gsnrie sgnrie rigsne irgsne rgisne grisne igrsne girsne risgne irsgne rsigne srigne isrgne sirgne rgsine grsine rsgine srgine gsrine sgrine igsrne gisrne isgrne sigrne gsirne sgirne nigsre ingsre ngisre gnisre ignsre ginsre nisgre insgre nsigre snigre isngre singre ngsire gnsire nsgire sngire gsnire sgnire igsnre gisnre isgnre signre gsinre sginre enigsr neigsr eingsr iengsr niegsr inegsr engisr negisr egnisr genisr ngeisr gneisr eignsr iegnsr eginsr geinsr igensr giensr nigesr ingesr ngiesr gniesr ignesr ginesr enisgr neisgr einsgr iensgr niesgr inesgr ensigr nesigr esnigr senigr nseigr sneigr eisngr iesngr esingr seingr isengr siengr nisegr insegr nsiegr sniegr isnegr sinegr engsir negsir egnsir gensir ngesir gnesir ensgir nesgir esngir sengir nsegir snegir egsnir gesnir esgnir segnir gsenir sgenir ngseir gnseir nsgeir sngeir gsneir sgneir eigsnr iegsnr egisnr geisnr igesnr giesnr eisgnr iesgnr esignr seignr isegnr siegnr egsinr gesinr esginr seginr gseinr sgeinr igsenr gisenr isgenr sigenr gsienr sgienr nigser ingser ngiser gniser ignser ginser nisger insger nsiger sniger isnger singer ngsier gnsier nsgier sngier gsnier sgnier igsner gisner isgner signer gsiner sginer
Note: these 'words' (valid or invalid) are all the permutations of the word renigs. These words are obtained by scrambling the letters in renigs.