C11112331312111112111133133313331333132323213331333133323312311   >>    C1111233131211111211113313331333133313232321333133313332331231   <<    C11112331312111112111133133313331333132323213331333133323312313   >>      C11112331312111112111133133313331333132323213331333133323312312   >>