C11112331312111112111133133313331333132323213311211111333131121111   >>    C1111233131211111211113313331333133313232321331121111133313112111   <<    C11112331312111112111133133313331333132323213311211111333131121113   >>      C11112331312111112111133133313331333132323213311211111333131121112   >>