C11112331312111112111133133313331333132323213311331323133313331312233311   >>    C1111233131211111211113313331333133313232321331133132313331333131223331   <<    C11112331312111112111133133313331333132323213311331323133313331312233313   >>      C11112331312111112111133133313331333132323213311331323133313331312233312   >>