upgang pugang ugpang gupang pguang gpuang upagng puagng uapgng aupgng paugng apugng ugapng guapng uagpng augpng gaupng agupng pgaung gpaung pagung apgung gapung agpung upgnag pugnag ugpnag gupnag pgunag gpunag upngag pungag unpgag nupgag pnugag npugag ugnpag gunpag ungpag nugpag gnupag ngupag pgnuag gpnuag pnguag npguag gnpuag ngpuag upangg puangg uapngg aupngg paungg apungg upnagg punagg unpagg nupagg pnuagg npuagg uanpgg aunpgg unapgg nuapgg anupgg naupgg panugg apnugg pnaugg npaugg anpugg napugg uganpg guanpg uagnpg augnpg gaunpg agunpg ugnapg gunapg ungapg nugapg gnuapg nguapg uangpg aungpg unagpg nuagpg anugpg naugpg ganupg agnupg gnaupg ngaupg angupg nagupg pganug gpanug pagnug apgnug gapnug agpnug pgnaug gpnaug pngaug npgaug gnpaug ngpaug pangug apngug pnagug npagug anpgug napgug ganpug agnpug gnapug ngapug angpug nagpug upgagn pugagn ugpagn gupagn pguagn gpuagn upaggn puaggn uapggn aupggn pauggn apuggn ugapgn guapgn uagpgn augpgn gaupgn agupgn pgaugn gpaugn pagugn apgugn gapugn agpugn upggan puggan ugpgan gupgan pgugan gpugan upggan puggan ugpgan gupgan pgugan gpugan uggpan gugpan uggpan gugpan ggupan ggupan pgguan gpguan pgguan gpguan ggpuan ggpuan upaggn puaggn uapggn aupggn pauggn apuggn upgagn pugagn ugpagn gupagn pguagn gpuagn uagpgn augpgn ugapgn guapgn agupgn gaupgn pagugn apgugn pgaugn gpaugn agpugn gapugn ugagpn guagpn uaggpn auggpn gaugpn agugpn uggapn gugapn uggapn gugapn gguapn gguapn uaggpn auggpn ugagpn guagpn agugpn gaugpn gagupn aggupn ggaupn ggaupn aggupn gagupn pgagun gpagun paggun apggun gapgun agpgun pggaun gpgaun pggaun gpgaun ggpaun ggpaun paggun apggun pgagun gpagun agpgun gapgun gagpun aggpun ggapun ggapun aggpun gagpun upgnga pugnga ugpnga gupnga pgunga gpunga upngga pungga unpgga nupgga pnugga npugga ugnpga gunpga ungpga nugpga gnupga ngupga pgnuga gpnuga pnguga npguga gnpuga ngpuga upggna puggna ugpgna gupgna pgugna gpugna upggna puggna ugpgna gupgna pgugna gpugna uggpna gugpna uggpna gugpna ggupna ggupna pgguna gpguna pgguna gpguna ggpuna ggpuna upngga pungga unpgga nupgga pnugga npugga upgnga pugnga ugpnga gupnga pgunga gpunga ungpga nugpga ugnpga gunpga ngupga gnupga pnguga npguga pgnuga gpnuga ngpuga gnpuga ugngpa gungpa unggpa nuggpa gnugpa ngugpa uggnpa gugnpa uggnpa gugnpa ggunpa ggunpa unggpa nuggpa ugngpa gungpa ngugpa gnugpa gngupa nggupa ggnupa ggnupa nggupa gngupa pgngua gpngua pnggua npggua gnpgua ngpgua pggnua gpgnua pggnua gpgnua ggpnua ggpnua pnggua npggua pgngua gpngua ngpgua gnpgua gngpua nggpua ggnpua ggnpua nggpua gngpua upangg puangg uapngg aupngg paungg apungg upnagg punagg unpagg nupagg pnuagg npuagg uanpgg aunpgg unapgg nuapgg anupgg naupgg panugg apnugg pnaugg npaugg anpugg napugg upagng puagng uapgng aupgng paugng apugng upgang pugang ugpang gupang pguang gpuang uagpng augpng ugapng guapng agupng gaupng pagung apgung pgaung gpaung agpung gapung upngag pungag unpgag nupgag pnugag npugag upgnag pugnag ugpnag gupnag pgunag gpunag ungpag nugpag ugnpag gunpag ngupag gnupag pnguag npguag pgnuag gpnuag ngpuag gnpuag uangpg aungpg unagpg nuagpg anugpg naugpg uagnpg augnpg uganpg guanpg agunpg gaunpg ungapg nugapg ugnapg gunapg nguapg gnuapg angupg nagupg agnupg ganupg ngaupg gnaupg pangug apngug pnagug npagug anpgug napgug pagnug apgnug pganug gpanug agpnug gapnug pngaug npgaug pgnaug gpnaug ngpaug gnpaug angpug nagpug agnpug ganpug ngapug gnapug ugangp guangp uagngp augngp gaungp agungp ugnagp gunagp ungagp nugagp gnuagp nguagp uanggp aunggp unaggp nuaggp anuggp nauggp ganugp agnugp gnaugp ngaugp angugp nagugp ugagnp guagnp uaggnp auggnp gaugnp agugnp ugganp guganp ugganp guganp gguanp gguanp uaggnp auggnp ugagnp guagnp agugnp gaugnp gagunp aggunp ggaunp ggaunp aggunp gagunp ugngap gungap unggap nuggap gnugap ngugap uggnap gugnap uggnap gugnap ggunap ggunap unggap nuggap ugngap gungap ngugap gnugap gnguap ngguap ggnuap ggnuap ngguap gnguap uanggp aunggp unaggp nuaggp anuggp nauggp uagngp augngp ugangp guangp agungp gaungp ungagp nugagp ugnagp gunagp nguagp gnuagp angugp nagugp agnugp ganugp ngaugp gnaugp gangup agngup gnagup ngagup anggup naggup gagnup aggnup gganup gganup aggnup gagnup gngaup nggaup ggnaup ggnaup nggaup gngaup anggup naggup agngup gangup ngagup gnagup pgangu gpangu pagngu apgngu gapngu agpngu pgnagu gpnagu pngagu npgagu gnpagu ngpagu panggu apnggu pnaggu npaggu anpggu napggu ganpgu agnpgu gnapgu ngapgu angpgu nagpgu pgagnu gpagnu paggnu apggnu gapgnu agpgnu pgganu gpganu pgganu gpganu ggpanu ggpanu paggnu apggnu pgagnu gpagnu agpgnu gapgnu gagpnu aggpnu ggapnu ggapnu aggpnu gagpnu pgngau gpngau pnggau npggau gnpgau ngpgau pggnau gpgnau pggnau gpgnau ggpnau ggpnau pnggau npggau pgngau gpngau ngpgau gnpgau gngpau nggpau ggnpau ggnpau nggpau gngpau panggu apnggu pnaggu npaggu anpggu napggu pagngu apgngu pgangu gpangu agpngu gapngu pngagu npgagu pgnagu gpnagu ngpagu gnpagu angpgu nagpgu agnpgu ganpgu ngapgu gnapgu gangpu agngpu gnagpu ngagpu anggpu naggpu gagnpu aggnpu gganpu gganpu aggnpu gagnpu gngapu nggapu ggnapu ggnapu nggapu gngapu anggpu naggpu agngpu gangpu ngagpu gnagpu
Note: these 'words' (valid or invalid) are all the permutations of the word upgang. These words are obtained by scrambling the letters in upgang.