C2221232323213331311331333133313231333132313331333121313233121233231321   >>    C222123232321333131133133313331323133313231333133312131323312123323132   <<    C2221232323213331311331333133313231333132313331333121313233121233231323   >>      C2221232323213331311331333133313231333132313331333121313233121233231322   >>