C2221232323213331311331333133313231333132313232313123232323221211   >>    C222123232321333131133133313331323133313231323231312323232322121   <<    C2221232323213331311331333133313231333132313232313123232323221213   >>      C2221232323213331311331333133313231333132313232313123232323221212   >>