C2221232323213331311331333133313231333132313331333121313233121232121221   >>    C222123232321333131133133313331323133313231333133312131323312123212122   <<    C2221232323213331311331333133313231333132313331333121313233121232121223   >>      C2221232323213331311331333133313231333132313331333121313233121232121222   >>