C11112331312111112111133133313331333133313331333133313231333133313113123121   >>    C1111233131211111211113313331333133313331333133313331323133313331311312312   <<    C11112331312111112111133133313331333133313331333133313231333133313113123123   >>      C11112331312111112111133133313331333133313331333133313231333133313113123122   >>