adrad darad ardad radad draad rdaad adard daard aadrd aadrd daard adard aradd raadd aardd aardd raadd aradd draad rdaad darad adrad radad ardad adrda darda ardda radda drada rdada addra dadra addra dadra ddara ddara ardda radda adrda darda rdada drada drdaa rddaa ddraa ddraa rddaa drdaa adadr daadr aaddr aaddr daadr adadr addar dadar addar dadar ddaar ddaar aaddr aaddr adadr daadr adadr daadr dadar addar ddaar ddaar addar dadar aradd raadd aardd aardd raadd aradd ardad radad adrad darad rdaad draad aadrd aadrd adard daard adard daard radad ardad rdaad draad adrad darad drada rdada darda adrda radda ardda drdaa rddaa ddraa ddraa rddaa drdaa dadra addra ddara ddara addra dadra radda ardda rdada drada adrda darda
Note: these 'words' (valid or invalid) are all the permutations of the word adrad. These words are obtained by scrambling the letters in adrad.