readd eradd raedd aredd eardd aerdd redad erdad rdead dread edrad derad raded arded rdaed draed adred dared eadrd aedrd edard deard aderd daerd readd eradd raedd aredd eardd aerdd redad erdad rdead dread edrad derad raded arded rdaed draed adred dared eadrd aedrd edard deard aderd daerd redda erdda rdeda dreda edrda derda redda erdda rdeda dreda edrda derda rddea drdea rddea drdea ddrea ddrea eddra dedra eddra dedra ddera ddera radde ardde rdade drade adrde darde radde ardde rdade drade adrde darde rddae drdae rddae drdae ddrae ddrae addre dadre addre dadre ddare ddare eaddr aeddr edadr deadr adedr daedr eaddr aeddr edadr deadr adedr daedr eddar dedar eddar dedar ddear ddear adder dader adder dader ddaer ddaer
Note: these 'words' (valid or invalid) are all the permutations of the word readd. These words are obtained by scrambling the letters in readd.