riads irads raids arids iards airds ridas irdas rdias drias idras diras radis ardis rdais drais adris daris iadrs aidrs idars diars adirs dairs riasd irasd raisd arisd iarsd airsd risad irsad rsiad sriad israd sirad rasid arsid rsaid sraid asrid sarid iasrd aisrd isard siard asird saird ridsa irdsa rdisa drisa idrsa dirsa risda irsda rsida srida isrda sirda rdsia drsia rsdia srdia dsria sdria idsra disra isdra sidra dsira sdira radsi ardsi rdasi drasi adrsi darsi rasdi arsdi rsadi sradi asrdi sardi rdsai drsai rsdai srdai dsrai sdrai adsri dasri asdri sadri dsari sdari iadsr aidsr idasr diasr adisr daisr iasdr aisdr isadr siadr asidr saidr idsar disar isdar sidar dsiar sdiar adsir dasir asdir sadir dsair sdair
Note: these 'words' (valid or invalid) are all the permutations of the word riads. These words are obtained by scrambling the letters in riads.