updry pudry udpry dupry pdury dpury uprdy purdy urpdy rupdy prudy rpudy udrpy durpy urdpy rudpy drupy rdupy pdruy dpruy prduy rpduy drpuy rdpuy updyr pudyr udpyr dupyr pduyr dpuyr upydr puydr uypdr yupdr pyudr ypudr udypr duypr uydpr yudpr dyupr ydupr pdyur dpyur pydur ypdur dypur ydpur upryd puryd urpyd rupyd pruyd rpuyd upyrd puyrd uyprd yuprd pyurd ypurd urypd ruypd uyrpd yurpd ryupd yrupd pryud rpyud pyrud yprud rypud yrpud udryp duryp urdyp rudyp druyp rduyp udyrp duyrp uydrp yudrp dyurp ydurp urydp ruydp uyrdp yurdp ryudp yrudp dryup rdyup dyrup ydrup rydup yrdup pdryu dpryu prdyu rpdyu drpyu rdpyu pdyru dpyru pydru ypdru dypru ydpru prydu rpydu pyrdu yprdu rypdu yrpdu drypu rdypu dyrpu ydrpu rydpu yrdpu
Note: these 'words' (valid or invalid) are all the permutations of the word updry. These words are obtained by scrambling the letters in updry.