cobid ocbid cboid bcoid obcid bocid coibd ocibd ciobd icobd oicbd iocbd cbiod bciod cibod icbod bicod ibcod obicd boicd oibcd iobcd biocd ibocd cobdi ocbdi cbodi bcodi obcdi bocdi codbi ocdbi cdobi dcobi odcbi docbi cbdoi bcdoi cdboi dcboi bdcoi dbcoi obdci bodci odbci dobci bdoci dboci coidb ocidb ciodb icodb oicdb iocdb codib ocdib cdoib dcoib odcib docib cidob icdob cdiob dciob idcob dicob oidcb iodcb odicb doicb idocb diocb cbido bcido cibdo icbdo bicdo ibcdo cbdio bcdio cdbio dcbio bdcio dbcio cidbo icdbo cdibo dcibo idcbo dicbo bidco ibdco bdico dbico idbco dibco obidc boidc oibdc iobdc biodc ibodc obdic bodic odbic dobic bdoic dboic oidbc iodbc odibc doibc idobc diobc bidoc ibdoc bdioc dbioc idboc diboc
Note: these 'words' (valid or invalid) are all the permutations of the word cobid. These words are obtained by scrambling the letters in cobid.