csrid scrid crsid rcsid srcid rscid csird scird cisrd icsrd sicrd iscrd crisd rcisd cirsd icrsd ricsd ircsd sricd rsicd sircd isrcd riscd irscd csrdi scrdi crsdi rcsdi srcdi rscdi csdri scdri cdsri dcsri sdcri dscri crdsi rcdsi cdrsi dcrsi rdcsi drcsi srdci rsdci sdrci dsrci rdsci drsci csidr scidr cisdr icsdr sicdr iscdr csdir scdir cdsir dcsir sdcir dscir cidsr icdsr cdisr dcisr idcsr dicsr sidcr isdcr sdicr dsicr idscr discr crids rcids cirds icrds ricds ircds crdis rcdis cdris dcris rdcis drcis cidrs icdrs cdirs dcirs idcrs dicrs ridcs irdcs rdics drics idrcs dircs sridc rsidc sirdc isrdc risdc irsdc srdic rsdic sdric dsric rdsic drsic sidrc isdrc sdirc dsirc idsrc disrc ridsc irdsc rdisc drisc idrsc dirsc
Note: these 'words' (valid or invalid) are all the permutations of the word csrid. These words are obtained by scrambling the letters in csrid.