C2221232323213331311331333133313231333132313231333113221311222121111   >>    C222123232321333131133133313331323133313231323133311322131122212111   <<    C2221232323213331311331333133313231333132313231333113221311222121113   >>      C2221232323213331311331333133313231333132313231333113221311222121112   >>