C2221232323213331311331333133313231333132313232313123232212221311   >>    C222123232321333131133133313331323133313231323231312323221222131   <<    C2221232323213331311331333133313231333132313232313123232212221313   >>      C2221232323213331311331333133313231333132313232313123232212221312   >>