C11112331312111112111133133313331333133313123313331331123121111331333132223221   >>    C1111233131211111211113313331333133313331312331333133112312111133133313222322   <<    C11112331312111112111133133313331333133313123313331331123121111331333132223223   >>      C11112331312111112111133133313331333133313123313331331123121111331333132223222   >>