audad uadad aduad dauad udaad duaad auadd uaadd aaudd aaudd uaadd auadd adaud daaud aadud aadud daaud adaud udaad duaad uadad audad dauad aduad audda uadda aduda dauda udada duada audda uadda aduda dauda udada duada addua dadua addua dadua ddaua ddaua uddaa dudaa uddaa dudaa dduaa dduaa auadd uaadd aaudd aaudd uaadd auadd audad uadad aduad dauad udaad duaad aadud aadud adaud daaud adaud daaud uadad audad udaad duaad aduad dauad adadu daadu aaddu aaddu daadu adadu addau dadau addau dadau ddaau ddaau aaddu aaddu adadu daadu adadu daadu dadau addau ddaau ddaau addau dadau udada duada uadda audda dauda aduda uddaa dudaa uddaa dudaa dduaa dduaa uadda audda udada duada aduda dauda dadua addua ddaua ddaua addua dadua
Note: these 'words' (valid or invalid) are all the permutations of the word audad. These words are obtained by scrambling the letters in audad.