C11112331312111112111133133313331333132323213311211111333232211   >>    C1111233131211111211113313331333133313232321331121111133323221   <<    C11112331312111112111133133313331333132323213311211111333232213   >>      C11112331312111112111133133313331333132323213311211111333232212   >>