C11112331312111112111133133313331333132323213311211111133232311   >>    C1111233131211111211113313331333133313232321331121111113323231   <<    C11112331312111112111133133313331333132323213311211111133232313   >>      C11112331312111112111133133313331333132323213311211111133232312   >>