C11112331312111112111133133313331333132322121111331333112211232311211311   >>    C1111233131211111211113313331333133313232212111133133311221123231121131   <<    C11112331312111112111133133313331333132322121111331333112211232311211313   >>      C11112331312111112111133133313331333132322121111331333112211232311211312   >>