C11112331312111112111133133313331333133313122111133133313113313331311123311   >>    C1111233131211111211113313331333133313331312211113313331311331333131112331   <<    C11112331312111112111133133313331333133313122111133133313113313331311123313   >>      C11112331312111112111133133313331333133313122111133133313113313331311123312   >>