C11112331312111112111133133313331333132323213331333133313331311223233231   >>    C1111233131211111211113313331333133313232321333133313331333131122323323   <<    C11112331312111112111133133313331333132323213331333133313331311223233233   >>      C11112331312111112111133133313331333132323213331333133313331311223233232   >>