C11112331312111112111133133313331333133313331333112211232322333121   >>    C1111233131211111211113313331333133313331333133311221123232233312   <<    C11112331312111112111133133313331333133313331333112211232322333123   >>      C11112331312111112111133133313331333133313331333112211232322333122   >>