C11112331312111112111133133313331333133313123313331331123213311   >>    C1111233131211111211113313331333133313331312331333133112321331   <<    C11112331312111112111133133313331333133313123313331331123213313   >>      C11112331312111112111133133313331333133313123313331331123213312   >>