yuprn uyprn ypurn pyurn upyrn puyrn yurpn uyrpn yrupn ryupn urypn ruypn yprun pyrun yrpun rypun pryun rpyun upryn puryn urpyn rupyn pruyn rpuyn yupnr uypnr ypunr pyunr upynr puynr yunpr uynpr ynupr nyupr unypr nuypr ypnur pynur ynpur nypur pnyur npyur upnyr punyr unpyr nupyr pnuyr npuyr yurnp uyrnp yrunp ryunp urynp ruynp yunrp uynrp ynurp nyurp unyrp nuyrp yrnup rynup ynrup nyrup rnyup nryup urnyp runyp unryp nuryp rnuyp nruyp yprnu pyrnu yrpnu rypnu prynu rpynu ypnru pynru ynpru nypru pnyru npyru yrnpu rynpu ynrpu nyrpu rnypu nrypu prnyu rpnyu pnryu npryu rnpyu nrpyu uprny purny urpny rupny pruny rpuny upnry punry unpry nupry pnury npury urnpy runpy unrpy nurpy rnupy nrupy prnuy rpnuy pnruy npruy rnpuy nrpuy
Note: these 'words' (valid or invalid) are all the permutations of the word yuprn. These words are obtained by scrambling the letters in yuprn.