C11112331312111112111133133313331333132323133313331333133323133213123121   >>    C1111233131211111211113313331333133313232313331333133313332313321312312   <<    C11112331312111112111133133313331333132323133313331333133323133213123123   >>      C11112331312111112111133133313331333132323133313331333133323133213123122   >>