duppy udppy dpupy pdupy updpy pudpy duppy udppy dpupy pdupy updpy pudpy dppuy pdpuy dppuy pdpuy ppduy ppduy uppdy pupdy uppdy pupdy ppudy ppudy dupyp udpyp dpuyp pduyp updyp pudyp duypp udypp dyupp ydupp uydpp yudpp dpyup pdyup dypup ydpup pydup ypdup upydp puydp uypdp yupdp pyudp ypudp dupyp udpyp dpuyp pduyp updyp pudyp duypp udypp dyupp ydupp uydpp yudpp dpyup pdyup dypup ydpup pydup ypdup upydp puydp uypdp yupdp pyudp ypudp dppyu pdpyu dppyu pdpyu ppdyu ppdyu dpypu pdypu dyppu ydppu pydpu ypdpu dpypu pdypu dyppu ydppu pydpu ypdpu ppydu ppydu pypdu yppdu pypdu yppdu uppyd pupyd uppyd pupyd ppuyd ppuyd upypd puypd uyppd yuppd pyupd ypupd upypd puypd uyppd yuppd pyupd ypupd ppyud ppyud pypud yppud pypud yppud
Note: these 'words' (valid or invalid) are all the permutations of the word duppy. These words are obtained by scrambling the letters in duppy.