C2221232323213331311331333133313231333132313232313123232221133231211   >>    C222123232321333131133133313331323133313231323231312323222113323121   <<    C2221232323213331311331333133313231333132313232313123232221133231213   >>      C2221232323213331311331333133313231333132313232313123232221133231212   >>