prunt rpunt purnt uprnt rupnt urpnt prnut rpnut pnrut nprut rnput nrput punrt upnrt pnurt npurt unprt nuprt runpt urnpt rnupt nrupt unrpt nurpt prutn rputn purtn uprtn ruptn urptn prtun rptun ptrun tprun rtpun trpun putrn uptrn pturn tpurn utprn tuprn rutpn urtpn rtupn trupn utrpn turpn prntu rpntu pnrtu nprtu rnptu nrptu prtnu rptnu ptrnu tprnu rtpnu trpnu pntru nptru ptnru tpnru ntpru tnpru rntpu nrtpu rtnpu trnpu ntrpu tnrpu puntr upntr pnutr nputr unptr nuptr putnr uptnr ptunr tpunr utpnr tupnr pntur nptur ptnur tpnur ntpur tnpur untpr nutpr utnpr tunpr ntupr tnupr runtp urntp rnutp nrutp unrtp nurtp rutnp urtnp rtunp trunp utrnp turnp rntup nrtup rtnup trnup ntrup tnrup untrp nutrp utnrp tunrp nturp tnurp
Note: these 'words' (valid or invalid) are all the permutations of the word prunt. These words are obtained by scrambling the letters in prunt.