C2221232323213331311331333133313231333132313331333121313233311112233221   >>    C222123232321333131133133313331323133313231333133312131323331111223322   <<    C2221232323213331311331333133313231333132313331333121313233311112233223   >>      C2221232323213331311331333133313231333132313331333121313233311112233222   >>