C11111333133313232233133313331333133313331311331333133313311232212311   >>    C1111133313331323223313331333133313331333131133133313331331123221231   <<    C11111333133313232233133313331333133313331311331333133313311232212313   >>      C11111333133313232233133313331333133313331311331333133313311232212312   >>