C11112331312111112111133133313331333133311222121111113313232223133313113313221   >>    C1111233131211111211113313331333133313331122212111111331323222313331311331322   <<    C11112331312111112111133133313331333133311222121111113313232223133313113313223   >>      C11112331312111112111133133313331333133311222121111113313232223133313113313222   >>