diroc idroc drioc rdioc irdoc ridoc diorc idorc doirc odirc iodrc oidrc droic rdoic doric odric rodic ordic irodc riodc iordc oirdc roidc oridc dirco idrco drico rdico irdco ridco dicro idcro dciro cdiro icdro cidro drcio rdcio dcrio cdrio rcdio crdio ircdo ricdo icrdo cirdo rcido crido diocr idocr doicr odicr iodcr oidcr dicor idcor dcior cdior icdor cidor docir odcir dcoir cdoir ocdir codir iocdr oicdr icodr ciodr ocidr coidr droci rdoci dorci odrci rodci ordci drcoi rdcoi dcroi cdroi rcdoi crdoi docri odcri dcori cdori ocdri codri rocdi orcdi rcodi crodi ocrdi cordi irocd riocd iorcd oircd roicd oricd ircod ricod icrod cirod rciod criod iocrd oicrd icord ciord ocird coird rocid orcid rcoid croid ocrid corid
Note: these 'words' (valid or invalid) are all the permutations of the word diroc. These words are obtained by scrambling the letters in diroc.