C11112331312111112111133133313331333132323133313331333112121111131232111   >>    C1111233131211111211113313331333133313232313331333133311212111113123211   <<    C11112331312111112111133133313331333132323133313331333112121111131232113   >>      C11112331312111112111133133313331333132323133313331333112121111131232112   >>