unpins nupins upnins punins npuins pnuins unipns nuipns uinpns iunpns niupns inupns upinns puinns uipnns iupnns piunns ipunns npiuns pniuns nipuns inpuns pinuns ipnuns unpnis nupnis upnnis punnis npunis pnunis unnpis nunpis unnpis nunpis nnupis nnupis upnnis punnis unpnis nupnis pnunis npunis npnuis pnnuis nnpuis nnpuis pnnuis npnuis uninps nuinps uinnps iunnps niunps inunps unnips nunips unnips nunips nnuips nnuips uinnps iunnps uninps nuinps inunps niunps ninups innups nniups nniups innups ninups upinns puinns uipnns iupnns piunns ipunns upnins punins unpins nupins pnuins npuins uinpns iunpns unipns nuipns inupns niupns pinuns ipnuns pniuns npiuns inpuns nipuns npinus pninus nipnus inpnus pinnus ipnnus npnius pnnius nnpius nnpius pnnius npnius ninpus innpus nnipus nnipus innpus ninpus pinnus ipnnus pninus npinus inpnus nipnus unpisn nupisn upnisn punisn npuisn pnuisn unipsn nuipsn uinpsn iunpsn niupsn inupsn upinsn puinsn uipnsn iupnsn piunsn ipunsn npiusn pniusn nipusn inpusn pinusn ipnusn unpsin nupsin upnsin punsin npusin pnusin unspin nuspin usnpin sunpin nsupin snupin upsnin pusnin uspnin supnin psunin spunin npsuin pnsuin nspuin snpuin psnuin spnuin unispn nuispn uinspn iunspn niuspn inuspn unsipn nusipn usnipn sunipn nsuipn snuipn uisnpn iusnpn usinpn suinpn isunpn siunpn nisupn insupn nsiupn sniupn isnupn sinupn upisnn puisnn uipsnn iupsnn piusnn ipusnn upsinn pusinn uspinn supinn psuinn spuinn uispnn iuspnn usipnn suipnn isupnn siupnn pisunn ipsunn psiunn spiunn ispunn sipunn npisun pnisun nipsun inpsun pinsun ipnsun npsiun pnsiun nspiun snpiun psniun spniun nispun inspun nsipun snipun isnpun sinpun pisnun ipsnun psinun spinun ispnun sipnun unpnsi nupnsi upnnsi punnsi npunsi pnunsi unnpsi nunpsi unnpsi nunpsi nnupsi nnupsi upnnsi punnsi unpnsi nupnsi pnunsi npunsi npnusi pnnusi nnpusi nnpusi pnnusi npnusi unpsni nupsni upnsni punsni npusni pnusni unspni nuspni usnpni sunpni nsupni snupni upsnni pusnni uspnni supnni psunni spunni npsuni pnsuni nspuni snpuni psnuni spnuni unnspi nunspi unnspi nunspi nnuspi nnuspi unsnpi nusnpi usnnpi sunnpi nsunpi snunpi unsnpi nusnpi usnnpi sunnpi nsunpi snunpi nnsupi nnsupi nsnupi snnupi nsnupi snnupi upnsni punsni unpsni nupsni pnusni npusni upsnni pusnni uspnni supnni psunni spunni unspni nuspni usnpni sunpni nsupni snupni pnsuni npsuni psnuni spnuni nspuni snpuni npnsui pnnsui nnpsui nnpsui pnnsui npnsui npsnui pnsnui nspnui snpnui psnnui spnnui nnspui nnspui nsnpui snnpui nsnpui snnpui pnsnui npsnui psnnui spnnui nspnui snpnui uninsp nuinsp uinnsp iunnsp niunsp inunsp unnisp nunisp unnisp nunisp nnuisp nnuisp uinnsp iunnsp uninsp nuinsp inunsp niunsp ninusp innusp nniusp nniusp innusp ninusp unisnp nuisnp uinsnp iunsnp niusnp inusnp unsinp nusinp usninp suninp nsuinp snuinp uisnnp iusnnp usinnp suinnp isunnp siunnp nisunp insunp nsiunp sniunp isnunp sinunp unnsip nunsip unnsip nunsip nnusip nnusip unsnip nusnip usnnip sunnip nsunip snunip unsnip nusnip usnnip sunnip nsunip snunip nnsuip nnsuip nsnuip snnuip nsnuip snnuip uinsnp iunsnp unisnp nuisnp inusnp niusnp uisnnp iusnnp usinnp suinnp isunnp siunnp unsinp nusinp usninp suninp nsuinp snuinp insunp nisunp isnunp sinunp nsiunp sniunp ninsup innsup nnisup nnisup innsup ninsup nisnup insnup nsinup sninup isnnup sinnup nnsiup nnsiup nsniup snniup nsniup snniup insnup nisnup isnnup sinnup nsinup sninup upinsn puinsn uipnsn iupnsn piunsn ipunsn upnisn punisn unpisn nupisn pnuisn npuisn uinpsn iunpsn unipsn nuipsn inupsn niupsn pinusn ipnusn pniusn npiusn inpusn nipusn upisnn puisnn uipsnn iupsnn piusnn ipusnn upsinn pusinn uspinn supinn psuinn spuinn uispnn iuspnn usipnn suipnn isupnn siupnn pisunn ipsunn psiunn spiunn ispunn sipunn upnsin punsin unpsin nupsin pnusin npusin upsnin pusnin uspnin supnin psunin spunin unspin nuspin usnpin sunpin nsupin snupin pnsuin npsuin psnuin spnuin nspuin snpuin uinspn iunspn unispn nuispn inuspn niuspn uisnpn iusnpn usinpn suinpn isunpn siunpn unsipn nusipn usnipn sunipn nsuipn snuipn insupn nisupn isnupn sinupn nsiupn sniupn pinsun ipnsun pnisun npisun inpsun nipsun pisnun ipsnun psinun spinun ispnun sipnun pnsiun npsiun psniun spniun nspiun snpiun inspun nispun isnpun sinpun nsipun snipun npinsu pninsu nipnsu inpnsu pinnsu ipnnsu npnisu pnnisu nnpisu nnpisu pnnisu npnisu ninpsu innpsu nnipsu nnipsu innpsu ninpsu pinnsu ipnnsu pninsu npinsu inpnsu nipnsu npisnu pnisnu nipsnu inpsnu pinsnu ipnsnu npsinu pnsinu nspinu snpinu psninu spninu nispnu inspnu nsipnu snipnu isnpnu sinpnu pisnnu ipsnnu psinnu spinnu ispnnu sipnnu npnsiu pnnsiu nnpsiu nnpsiu pnnsiu npnsiu npsniu pnsniu nspniu snpniu psnniu spnniu nnspiu nnspiu nsnpiu snnpiu nsnpiu snnpiu pnsniu npsniu psnniu spnniu nspniu snpniu ninspu innspu nnispu nnispu innspu ninspu nisnpu insnpu nsinpu sninpu isnnpu sinnpu nnsipu nnsipu nsnipu snnipu nsnipu snnipu insnpu nisnpu isnnpu sinnpu nsinpu sninpu pinsnu ipnsnu pnisnu npisnu inpsnu nipsnu pisnnu ipsnnu psinnu spinnu ispnnu sipnnu pnsinu npsinu psninu spninu nspinu snpinu inspnu nispnu isnpnu sinpnu nsipnu snipnu
Note: these 'words' (valid or invalid) are all the permutations of the word unpins. These words are obtained by scrambling the letters in unpins.