C2221232323213331311331333133313231333132313232313123232212322121   >>    C222123232321333131133133313331323133313231323231312323221232212   <<    C2221232323213331311331333133313231333132313232313123232212322123   >>      C2221232323213331311331333133313231333132313232313123232212322122   >>