C2221232323213331311331333133313231333132313232313123232223223121   >>    C222123232321333131133133313331323133313231323231312323222322312   <<    C2221232323213331311331333133313231333132313232313123232223223123   >>      C2221232323213331311331333133313231333132313232313123232223223122   >>