unpack nupack upnack punack npuack pnuack unapck nuapck uanpck aunpck naupck anupck upanck puanck uapnck aupnck paunck apunck npauck pnauck napuck anpuck panuck apnuck unpcak nupcak upncak puncak npucak pnucak uncpak nucpak ucnpak cunpak ncupak cnupak upcnak pucnak ucpnak cupnak pcunak cpunak npcuak pncuak ncpuak cnpuak pcnuak cpnuak unacpk nuacpk uancpk auncpk naucpk anucpk uncapk nucapk ucnapk cunapk ncuapk cnuapk uacnpk aucnpk ucanpk cuanpk acunpk caunpk nacupk ancupk ncaupk cnaupk acnupk canupk upacnk puacnk uapcnk aupcnk paucnk apucnk upcank pucank ucpank cupank pcuank cpuank uacpnk aucpnk ucapnk cuapnk acupnk caupnk pacunk apcunk pcaunk cpaunk acpunk capunk npacuk pnacuk napcuk anpcuk pancuk apncuk npcauk pncauk ncpauk cnpauk pcnauk cpnauk nacpuk ancpuk ncapuk cnapuk acnpuk canpuk pacnuk apcnuk pcanuk cpanuk acpnuk capnuk unpakc nupakc upnakc punakc npuakc pnuakc unapkc nuapkc uanpkc aunpkc naupkc anupkc upankc puankc uapnkc aupnkc paunkc apunkc npaukc pnaukc napukc anpukc panukc apnukc unpkac nupkac upnkac punkac npukac pnukac unkpac nukpac uknpac kunpac nkupac knupac upknac puknac ukpnac kupnac pkunac kpunac npkuac pnkuac nkpuac knpuac pknuac kpnuac unakpc nuakpc uankpc aunkpc naukpc anukpc unkapc nukapc uknapc kunapc nkuapc knuapc uaknpc auknpc ukanpc kuanpc akunpc kaunpc nakupc ankupc nkaupc knaupc aknupc kanupc upaknc puaknc uapknc aupknc pauknc apuknc upkanc pukanc ukpanc kupanc pkuanc kpuanc uakpnc aukpnc ukapnc kuapnc akupnc kaupnc pakunc apkunc pkaunc kpaunc akpunc kapunc npakuc pnakuc napkuc anpkuc pankuc apnkuc npkauc pnkauc nkpauc knpauc pknauc kpnauc nakpuc ankpuc nkapuc knapuc aknpuc kanpuc paknuc apknuc pkanuc kpanuc akpnuc kapnuc unpcka nupcka upncka puncka npucka pnucka uncpka nucpka ucnpka cunpka ncupka cnupka upcnka pucnka ucpnka cupnka pcunka cpunka npcuka pncuka ncpuka cnpuka pcnuka cpnuka unpkca nupkca upnkca punkca npukca pnukca unkpca nukpca uknpca kunpca nkupca knupca upknca puknca ukpnca kupnca pkunca kpunca npkuca pnkuca nkpuca knpuca pknuca kpnuca unckpa nuckpa ucnkpa cunkpa ncukpa cnukpa unkcpa nukcpa ukncpa kuncpa nkucpa knucpa ucknpa cuknpa ukcnpa kucnpa ckunpa kcunpa nckupa cnkupa nkcupa kncupa cknupa kcnupa upckna puckna ucpkna cupkna pcukna cpukna upkcna pukcna ukpcna kupcna pkucna kpucna uckpna cukpna ukcpna kucpna ckupna kcupna pckuna cpkuna pkcuna kpcuna ckpuna kcpuna npckua pnckua ncpkua cnpkua pcnkua cpnkua npkcua pnkcua nkpcua knpcua pkncua kpncua nckpua cnkpua nkcpua kncpua cknpua kcnpua pcknua cpknua pkcnua kpcnua ckpnua kcpnua unackp nuackp uanckp aunckp nauckp anuckp uncakp nucakp ucnakp cunakp ncuakp cnuakp uacnkp aucnkp ucankp cuankp acunkp caunkp nacukp ancukp ncaukp cnaukp acnukp canukp unakcp nuakcp uankcp aunkcp naukcp anukcp unkacp nukacp uknacp kunacp nkuacp knuacp uakncp aukncp ukancp kuancp akuncp kauncp nakucp ankucp nkaucp knaucp aknucp kanucp unckap nuckap ucnkap cunkap ncukap cnukap unkcap nukcap ukncap kuncap nkucap knucap ucknap cuknap ukcnap kucnap ckunap kcunap nckuap cnkuap nkcuap kncuap cknuap kcnuap uacknp aucknp ucaknp cuaknp acuknp cauknp uakcnp aukcnp ukacnp kuacnp akucnp kaucnp uckanp cukanp ukcanp kucanp ckuanp kcuanp ackunp cakunp akcunp kacunp ckaunp kcaunp nackup anckup ncakup cnakup acnkup cankup nakcup ankcup nkacup knacup akncup kancup nckaup cnkaup nkcaup kncaup cknaup kcnaup acknup caknup akcnup kacnup ckanup kcanup upackn puackn uapckn aupckn pauckn apuckn upcakn pucakn ucpakn cupakn pcuakn cpuakn uacpkn aucpkn ucapkn cuapkn acupkn caupkn pacukn apcukn pcaukn cpaukn acpukn capukn upakcn puakcn uapkcn aupkcn paukcn apukcn upkacn pukacn ukpacn kupacn pkuacn kpuacn uakpcn aukpcn ukapcn kuapcn akupcn kaupcn pakucn apkucn pkaucn kpaucn akpucn kapucn upckan puckan ucpkan cupkan pcukan cpukan upkcan pukcan ukpcan kupcan pkucan kpucan uckpan cukpan ukcpan kucpan ckupan kcupan pckuan cpkuan pkcuan kpcuan ckpuan kcpuan uackpn auckpn ucakpn cuakpn acukpn caukpn uakcpn aukcpn ukacpn kuacpn akucpn kaucpn uckapn cukapn ukcapn kucapn ckuapn kcuapn ackupn cakupn akcupn kacupn ckaupn kcaupn packun apckun pcakun cpakun acpkun capkun pakcun apkcun pkacun kpacun akpcun kapcun pckaun cpkaun pkcaun kpcaun ckpaun kcpaun ackpun cakpun akcpun kacpun ckapun kcapun npacku pnacku napcku anpcku pancku apncku npcaku pncaku ncpaku cnpaku pcnaku cpnaku nacpku ancpku ncapku cnapku acnpku canpku pacnku apcnku pcanku cpanku acpnku capnku npakcu pnakcu napkcu anpkcu pankcu apnkcu npkacu pnkacu nkpacu knpacu pknacu kpnacu nakpcu ankpcu nkapcu knapcu aknpcu kanpcu pakncu apkncu pkancu kpancu akpncu kapncu npckau pnckau ncpkau cnpkau pcnkau cpnkau npkcau pnkcau nkpcau knpcau pkncau kpncau nckpau cnkpau nkcpau kncpau cknpau kcnpau pcknau cpknau pkcnau kpcnau ckpnau kcpnau nackpu anckpu ncakpu cnakpu acnkpu cankpu nakcpu ankcpu nkacpu knacpu akncpu kancpu nckapu cnkapu nkcapu kncapu cknapu kcnapu acknpu caknpu akcnpu kacnpu ckanpu kcanpu packnu apcknu pcaknu cpaknu acpknu capknu pakcnu apkcnu pkacnu kpacnu akpcnu kapcnu pckanu cpkanu pkcanu kpcanu ckpanu kcpanu ackpnu cakpnu akcpnu kacpnu ckapnu kcapnu
Note: these 'words' (valid or invalid) are all the permutations of the word unpack. These words are obtained by scrambling the letters in unpack.