C2221232323213331311331333133313231333132313231333113221312231211   >>    C222123232321333131133133313331323133313231323133311322131223121   <<    C2221232323213331311331333133313231333132313231333113221312231213   >>      C2221232323213331311331333133313231333132313231333113221312231212   >>