C2221232323213331311331333133313231333132313232313123232211331121311   >>    C222123232321333131133133313331323133313231323231312323221133112131   <<    C2221232323213331311331333133313231333132313232313123232211331121313   >>      C2221232323213331311331333133313231333132313232313123232211331121312   >>