C11112331312111112111133133313331333131211111333133313331333133313231331123311   >>    C1111233131211111211113313331333133313121111133313331333133313331323133112331   <<    C11112331312111112111133133313331333131211111333133313331333133313231331123313   >>      C11112331312111112111133133313331333131211111333133313331333133313231331123312   >>