C2221232323213331311331333133313231333132313232313123232211312311221   >>    C222123232321333131133133313331323133313231323231312323221131231122   <<    C2221232323213331311331333133313231333132313232313123232211312311223   >>      C2221232323213331311331333133313231333132313232313123232211312311222   >>