C11112331312111112111133133313331333133313113233231333133313331312223311   >>    C1111233131211111211113313331333133313331311323323133313331333131222331   <<    C11112331312111112111133133313331333133313113233231333133313331312223313   >>      C11112331312111112111133133313331333133313113233231333133313331312223312   >>