C2221232323213331311331333133313231333132313231333113223212123121   >>    C222123232321333131133133313331323133313231323133311322321212312   <<    C2221232323213331311331333133313231333132313231333113223212123123   >>      C2221232323213331311331333133313231333132313231333113223212123122   >>