purin uprin pruin rpuin urpin rupin puirn upirn piurn ipurn uiprn iuprn priun rpiun pirun iprun ripun irpun uripn ruipn uirpn iurpn riupn irupn purni uprni pruni rpuni urpni rupni punri upnri pnuri npuri unpri nupri prnui rpnui pnrui nprui rnpui nrpui urnpi runpi unrpi nurpi rnupi nrupi puinr upinr piunr ipunr uipnr iupnr punir upnir pnuir npuir unpir nupir pinur ipnur pniur npiur inpur nipur uinpr iunpr unipr nuipr inupr niupr prinu rpinu pirnu iprnu ripnu irpnu prniu rpniu pnriu npriu rnpiu nrpiu pinru ipnru pniru npiru inpru nipru rinpu irnpu rnipu nripu inrpu nirpu urinp ruinp uirnp iurnp riunp irunp urnip runip unrip nurip rnuip nruip uinrp iunrp unirp nuirp inurp niurp rinup irnup rniup nriup inrup nirup
Note: these 'words' (valid or invalid) are all the permutations of the word purin. These words are obtained by scrambling the letters in purin.