impugn mipugn ipmugn pimugn mpiugn pmiugn imupgn miupgn iumpgn uimpgn muipgn umipgn ipumgn piumgn iupmgn uipmgn puimgn upimgn mpuign pmuign mupign umpign pumign upmign impgun mipgun ipmgun pimgun mpigun pmigun imgpun migpun igmpun gimpun mgipun gmipun ipgmun pigmun igpmun gipmun pgimun gpimun mpgiun pmgiun mgpiun gmpiun pgmiun gpmiun imugpn miugpn iumgpn uimgpn muigpn umigpn imgupn migupn igmupn gimupn mgiupn gmiupn iugmpn uigmpn igumpn giumpn ugimpn guimpn mugipn umgipn mguipn gmuipn ugmipn gumipn ipugmn piugmn iupgmn uipgmn puigmn upigmn ipgumn pigumn igpumn gipumn pgiumn gpiumn iugpmn uigpmn igupmn giupmn ugipmn guipmn pugimn upgimn pguimn gpuimn ugpimn gupimn mpugin pmugin mupgin umpgin pumgin upmgin mpguin pmguin mgpuin gmpuin pgmuin gpmuin mugpin umgpin mgupin gmupin ugmpin gumpin pugmin upgmin pgumin gpumin ugpmin gupmin impung mipung ipmung pimung mpiung pmiung imupng miupng iumpng uimpng muipng umipng ipumng piumng iupmng uipmng puimng upimng mpuing pmuing muping umping puming upming impnug mipnug ipmnug pimnug mpinug pminug imnpug minpug inmpug nimpug mnipug nmipug ipnmug pinmug inpmug nipmug pnimug npimug mpniug pmniug mnpiug nmpiug pnmiug npmiug imunpg miunpg iumnpg uimnpg muinpg uminpg imnupg minupg inmupg nimupg mniupg nmiupg iunmpg uinmpg inumpg niumpg unimpg nuimpg munipg umnipg mnuipg nmuipg unmipg numipg ipunmg piunmg iupnmg uipnmg puinmg upinmg ipnumg pinumg inpumg nipumg pniumg npiumg iunpmg uinpmg inupmg niupmg unipmg nuipmg punimg upnimg pnuimg npuimg unpimg nupimg mpunig pmunig mupnig umpnig pumnig upmnig mpnuig pmnuig mnpuig nmpuig pnmuig npmuig munpig umnpig mnupig nmupig unmpig numpig punmig upnmig pnumig npumig unpmig nupmig impgnu mipgnu ipmgnu pimgnu mpignu pmignu imgpnu migpnu igmpnu gimpnu mgipnu gmipnu ipgmnu pigmnu igpmnu gipmnu pgimnu gpimnu mpginu pmginu mgpinu gmpinu pgminu gpminu impngu mipngu ipmngu pimngu mpingu pmingu imnpgu minpgu inmpgu nimpgu mnipgu nmipgu ipnmgu pinmgu inpmgu nipmgu pnimgu npimgu mpnigu pmnigu mnpigu nmpigu pnmigu npmigu imgnpu mignpu igmnpu gimnpu mginpu gminpu imngpu mingpu inmgpu nimgpu mnigpu nmigpu ignmpu ginmpu ingmpu nigmpu gnimpu ngimpu mgnipu gmnipu mngipu nmgipu gnmipu ngmipu ipgnmu pignmu igpnmu gipnmu pginmu gpinmu ipngmu pingmu inpgmu nipgmu pnigmu npigmu ignpmu ginpmu ingpmu nigpmu gnipmu ngipmu pgnimu gpnimu pngimu npgimu gnpimu ngpimu mpgniu pmgniu mgpniu gmpniu pgmniu gpmniu mpngiu pmngiu mnpgiu nmpgiu pnmgiu npmgiu mgnpiu gmnpiu mngpiu nmgpiu gnmpiu ngmpiu pgnmiu gpnmiu pngmiu npgmiu gnpmiu ngpmiu imugnp miugnp iumgnp uimgnp muignp umignp imgunp migunp igmunp gimunp mgiunp gmiunp iugmnp uigmnp igumnp giumnp ugimnp guimnp muginp umginp mguinp gmuinp ugminp guminp imungp miungp iumngp uimngp muingp umingp imnugp minugp inmugp nimugp mniugp nmiugp iunmgp uinmgp inumgp niumgp unimgp nuimgp munigp umnigp mnuigp nmuigp unmigp numigp imgnup mignup igmnup gimnup mginup gminup imngup mingup inmgup nimgup mnigup nmigup ignmup ginmup ingmup nigmup gnimup ngimup mgniup gmniup mngiup nmgiup gnmiup ngmiup iugnmp uignmp igunmp giunmp uginmp guinmp iungmp uingmp inugmp niugmp unigmp nuigmp ignump ginump ingump nigump gniump ngiump ugnimp gunimp ungimp nugimp gnuimp nguimp mugnip umgnip mgunip gmunip ugmnip gumnip mungip umngip mnugip nmugip unmgip numgip mgnuip gmnuip mnguip nmguip gnmuip ngmuip ugnmip gunmip ungmip nugmip gnumip ngumip ipugnm piugnm iupgnm uipgnm puignm upignm ipgunm pigunm igpunm gipunm pgiunm gpiunm iugpnm uigpnm igupnm giupnm ugipnm guipnm puginm upginm pguinm gpuinm ugpinm gupinm ipungm piungm iupngm uipngm puingm upingm ipnugm pinugm inpugm nipugm pniugm npiugm iunpgm uinpgm inupgm niupgm unipgm nuipgm punigm upnigm pnuigm npuigm unpigm nupigm ipgnum pignum igpnum gipnum pginum gpinum ipngum pingum inpgum nipgum pnigum npigum ignpum ginpum ingpum nigpum gnipum ngipum pgnium gpnium pngium npgium gnpium ngpium iugnpm uignpm igunpm giunpm uginpm guinpm iungpm uingpm inugpm niugpm unigpm nuigpm ignupm ginupm ingupm nigupm gniupm ngiupm ugnipm gunipm ungipm nugipm gnuipm nguipm pugnim upgnim pgunim gpunim ugpnim gupnim pungim upngim pnugim npugim unpgim nupgim pgnuim gpnuim pnguim npguim gnpuim ngpuim ugnpim gunpim ungpim nugpim gnupim ngupim mpugni pmugni mupgni umpgni pumgni upmgni mpguni pmguni mgpuni gmpuni pgmuni gpmuni mugpni umgpni mgupni gmupni ugmpni gumpni pugmni upgmni pgumni gpumni ugpmni gupmni mpungi pmungi mupngi umpngi pumngi upmngi mpnugi pmnugi mnpugi nmpugi pnmugi npmugi munpgi umnpgi mnupgi nmupgi unmpgi numpgi punmgi upnmgi pnumgi npumgi unpmgi nupmgi mpgnui pmgnui mgpnui gmpnui pgmnui gpmnui mpngui pmngui mnpgui nmpgui pnmgui npmgui mgnpui gmnpui mngpui nmgpui gnmpui ngmpui pgnmui gpnmui pngmui npgmui gnpmui ngpmui mugnpi umgnpi mgunpi gmunpi ugmnpi gumnpi mungpi umngpi mnugpi nmugpi unmgpi numgpi mgnupi gmnupi mngupi nmgupi gnmupi ngmupi ugnmpi gunmpi ungmpi nugmpi gnumpi ngumpi pugnmi upgnmi pgunmi gpunmi ugpnmi gupnmi pungmi upngmi pnugmi npugmi unpgmi nupgmi pgnumi gpnumi pngumi npgumi gnpumi ngpumi ugnpmi gunpmi ungpmi nugpmi gnupmi ngupmi
Note: these 'words' (valid or invalid) are all the permutations of the word impugn. These words are obtained by scrambling the letters in impugn.