C2221232323213331311331333133313231333131133231323323223312211121   >>    C222123232321333131133133313331323133313113323132332322331221112   <<    C2221232323213331311331333133313231333131133231323323223312211123   >>      C2221232323213331311331333133313231333131133231323323223312211122   >>