C2221232323213331311331333133313231333132313331333121313233123221311   >>    C222123232321333131133133313331323133313231333133312131323312322131   <<    C2221232323213331311331333133313231333132313331333121313233123221313   >>      C2221232323213331311331333133313231333132313331333121313233123221312   >>