prngub rpngub pnrgub nprgub rnpgub nrpgub prgnub rpgnub pgrnub gprnub rgpnub grpnub pngrub npgrub pgnrub gpnrub ngprub gnprub rngpub nrgpub rgnpub grnpub ngrpub gnrpub prnugb rpnugb pnrugb nprugb rnpugb nrpugb prungb rpungb purngb uprngb rupngb urpngb pnurgb npurgb punrgb upnrgb nuprgb unprgb rnupgb nrupgb runpgb urnpgb nurpgb unrpgb prgunb rpgunb pgrunb gprunb rgpunb grpunb prugnb rpugnb purgnb uprgnb rupgnb urpgnb pgurnb gpurnb pugrnb upgrnb guprnb ugprnb rgupnb grupnb rugpnb urgpnb gurpnb ugrpnb pngurb npgurb pgnurb gpnurb ngpurb gnpurb pnugrb npugrb pungrb upngrb nupgrb unpgrb pgunrb gpunrb pugnrb upgnrb gupnrb ugpnrb nguprb gnuprb nugprb ungprb gunprb ugnprb rngupb nrgupb rgnupb grnupb ngrupb gnrupb rnugpb nrugpb rungpb urngpb nurgpb unrgpb rgunpb grunpb rugnpb urgnpb gurnpb ugrnpb ngurpb gnurpb nugrpb ungrpb gunrpb ugnrpb prngbu rpngbu pnrgbu nprgbu rnpgbu nrpgbu prgnbu rpgnbu pgrnbu gprnbu rgpnbu grpnbu pngrbu npgrbu pgnrbu gpnrbu ngprbu gnprbu rngpbu nrgpbu rgnpbu grnpbu ngrpbu gnrpbu prnbgu rpnbgu pnrbgu nprbgu rnpbgu nrpbgu prbngu rpbngu pbrngu bprngu rbpngu brpngu pnbrgu npbrgu pbnrgu bpnrgu nbprgu bnprgu rnbpgu nrbpgu rbnpgu brnpgu nbrpgu bnrpgu prgbnu rpgbnu pgrbnu gprbnu rgpbnu grpbnu prbgnu rpbgnu pbrgnu bprgnu rbpgnu brpgnu pgbrnu gpbrnu pbgrnu bpgrnu gbprnu bgprnu rgbpnu grbpnu rbgpnu brgpnu gbrpnu bgrpnu pngbru npgbru pgnbru gpnbru ngpbru gnpbru pnbgru npbgru pbngru bpngru nbpgru bnpgru pgbnru gpbnru pbgnru bpgnru gbpnru bgpnru ngbpru gnbpru nbgpru bngpru gbnpru bgnpru rngbpu nrgbpu rgnbpu grnbpu ngrbpu gnrbpu rnbgpu nrbgpu rbngpu brngpu nbrgpu bnrgpu rgbnpu grbnpu rbgnpu brgnpu gbrnpu bgrnpu ngbrpu gnbrpu nbgrpu bngrpu gbnrpu bgnrpu prnubg rpnubg pnrubg nprubg rnpubg nrpubg prunbg rpunbg purnbg uprnbg rupnbg urpnbg pnurbg npurbg punrbg upnrbg nuprbg unprbg rnupbg nrupbg runpbg urnpbg nurpbg unrpbg prnbug rpnbug pnrbug nprbug rnpbug nrpbug prbnug rpbnug pbrnug bprnug rbpnug brpnug pnbrug npbrug pbnrug bpnrug nbprug bnprug rnbpug nrbpug rbnpug brnpug nbrpug bnrpug prubng rpubng purbng uprbng rupbng urpbng prbung rpbung pbrung bprung rbpung brpung pubrng upbrng pburng bpurng ubprng buprng rubpng urbpng rbupng brupng ubrpng burpng pnubrg npubrg punbrg upnbrg nupbrg unpbrg pnburg npburg pbnurg bpnurg nbpurg bnpurg pubnrg upbnrg pbunrg bpunrg ubpnrg bupnrg nubprg unbprg nbuprg bnuprg ubnprg bunprg rnubpg nrubpg runbpg urnbpg nurbpg unrbpg rnbupg nrbupg rbnupg brnupg nbrupg bnrupg rubnpg urbnpg rbunpg brunpg ubrnpg burnpg nubrpg unbrpg nburpg bnurpg ubnrpg bunrpg prgubn rpgubn pgrubn gprubn rgpubn grpubn prugbn rpugbn purgbn uprgbn rupgbn urpgbn pgurbn gpurbn pugrbn upgrbn guprbn ugprbn rgupbn grupbn rugpbn urgpbn gurpbn ugrpbn prgbun rpgbun pgrbun gprbun rgpbun grpbun prbgun rpbgun pbrgun bprgun rbpgun brpgun pgbrun gpbrun pbgrun bpgrun gbprun bgprun rgbpun grbpun rbgpun brgpun gbrpun bgrpun prubgn rpubgn purbgn uprbgn rupbgn urpbgn prbugn rpbugn pbrugn bprugn rbpugn brpugn pubrgn upbrgn pburgn bpurgn ubprgn buprgn rubpgn urbpgn rbupgn brupgn ubrpgn burpgn pgubrn gpubrn pugbrn upgbrn gupbrn ugpbrn pgburn gpburn pbgurn bpgurn gbpurn bgpurn pubgrn upbgrn pbugrn bpugrn ubpgrn bupgrn gubprn ugbprn gbuprn bguprn ubgprn bugprn rgubpn grubpn rugbpn urgbpn gurbpn ugrbpn rgbupn grbupn rbgupn brgupn gbrupn bgrupn rubgpn urbgpn rbugpn brugpn ubrgpn burgpn gubrpn ugbrpn gburpn bgurpn ubgrpn bugrpn pngubr npgubr pgnubr gpnubr ngpubr gnpubr pnugbr npugbr pungbr upngbr nupgbr unpgbr pgunbr gpunbr pugnbr upgnbr gupnbr ugpnbr ngupbr gnupbr nugpbr ungpbr gunpbr ugnpbr pngbur npgbur pgnbur gpnbur ngpbur gnpbur pnbgur npbgur pbngur bpngur nbpgur bnpgur pgbnur gpbnur pbgnur bpgnur gbpnur bgpnur ngbpur gnbpur nbgpur bngpur gbnpur bgnpur pnubgr npubgr punbgr upnbgr nupbgr unpbgr pnbugr npbugr pbnugr bpnugr nbpugr bnpugr pubngr upbngr pbungr bpungr ubpngr bupngr nubpgr unbpgr nbupgr bnupgr ubnpgr bunpgr pgubnr gpubnr pugbnr upgbnr gupbnr ugpbnr pgbunr gpbunr pbgunr bpgunr gbpunr bgpunr pubgnr upbgnr pbugnr bpugnr ubpgnr bupgnr gubpnr ugbpnr gbupnr bgupnr ubgpnr bugpnr ngubpr gnubpr nugbpr ungbpr gunbpr ugnbpr ngbupr gnbupr nbgupr bngupr gbnupr bgnupr nubgpr unbgpr nbugpr bnugpr ubngpr bungpr gubnpr ugbnpr gbunpr bgunpr ubgnpr bugnpr rngubp nrgubp rgnubp grnubp ngrubp gnrubp rnugbp nrugbp rungbp urngbp nurgbp unrgbp rgunbp grunbp rugnbp urgnbp gurnbp ugrnbp ngurbp gnurbp nugrbp ungrbp gunrbp ugnrbp rngbup nrgbup rgnbup grnbup ngrbup gnrbup rnbgup nrbgup rbngup brngup nbrgup bnrgup rgbnup grbnup rbgnup brgnup gbrnup bgrnup ngbrup gnbrup nbgrup bngrup gbnrup bgnrup rnubgp nrubgp runbgp urnbgp nurbgp unrbgp rnbugp nrbugp rbnugp brnugp nbrugp bnrugp rubngp urbngp rbungp brungp ubrngp burngp nubrgp unbrgp nburgp bnurgp ubnrgp bunrgp rgubnp grubnp rugbnp urgbnp gurbnp ugrbnp rgbunp grbunp rbgunp brgunp gbrunp bgrunp rubgnp urbgnp rbugnp brugnp ubrgnp burgnp gubrnp ugbrnp gburnp bgurnp ubgrnp bugrnp ngubrp gnubrp nugbrp ungbrp gunbrp ugnbrp ngburp gnburp nbgurp bngurp gbnurp bgnurp nubgrp unbgrp nbugrp bnugrp ubngrp bungrp gubnrp ugbnrp gbunrp bgunrp ubgnrp bugnrp
Note: these 'words' (valid or invalid) are all the permutations of the word prngub. These words are obtained by scrambling the letters in prngub.