C11112331312111112111133133313331333132323213331333133313311223221211   >>    C1111233131211111211113313331333133313232321333133313331331122322121   <<    C11112331312111112111133133313331333132323213331333133313311223221213   >>      C11112331312111112111133133313331333132323213331333133313311223221212   >>