C2221232323213331311331333133313231333132313331333121313233213221   >>    C222123232321333131133133313331323133313231333133312131323321322   <<    C2221232323213331311331333133313231333132313331333121313233213223   >>      C2221232323213331311331333133313231333132313331333121313233213222   >>