C11112331312111112111133133313331333132313233313331333132223133313123311   >>    C1111233131211111211113313331333133313231323331333133313222313331312331   <<    C11112331312111112111133133313331333132313233313331333132223133313123313   >>      C11112331312111112111133133313331333132313233313331333132223133313123312   >>