C11112331312111112111133133313331333132323213331333133112232311   >>    C1111233131211111211113313331333133313232321333133313311223231   <<    C11112331312111112111133133313331333132323213331333133112232313   >>      C11112331312111112111133133313331333132323213331333133112232312   >>