C2221232323213331311331333133313231333132313231333113221223132212121   >>    C222123232321333131133133313331323133313231323133311322122313221212   <<    C2221232323213331311331333133313231333132313231333113221223132212123   >>      C2221232323213331311331333133313231333132313231333113221223132212122   >>