ridic irdic rdiic driic idric diric riidc iridc riidc iridc iirdc iirdc rdiic driic ridic irdic diric idric idirc diirc iidrc iidrc diirc idirc ridci irdci rdici drici idrci dirci ricdi ircdi rcidi cridi icrdi cirdi rdcii drcii rcdii crdii dcrii cdrii idcri dicri icdri cidri dciri cdiri riicd iricd riicd iricd iircd iircd ricid ircid rciid criid icrid cirid ricid ircid rciid criid icrid cirid iicrd iicrd icird ciird icird ciird rdici drici ridci irdci dirci idrci rdcii drcii rcdii crdii dcrii cdrii ricdi ircdi rcidi cridi icrdi cirdi dicri idcri dciri cdiri icdri cidri idicr diicr iidcr iidcr diicr idicr idcir dicir icdir cidir dciir cdiir iicdr iicdr icidr ciidr icidr ciidr dicir idcir dciir cdiir icdir cidir
Note: these 'words' (valid or invalid) are all the permutations of the word ridic. These words are obtained by scrambling the letters in ridic.