C2221232323213331311331333133313231333132313331333121313232313133222121   >>    C222123232321333131133133313331323133313231333133312131323231313322212   <<    C2221232323213331311331333133313231333132313331333121313232313133222123   >>      C2221232323213331311331333133313231333132313331333121313232313133222122   >>