C312312111111331312111133133313231333133313121211113313232233132313232311   >>    C31231211111133131211113313331323133313331312121111331323223313231323231   <<    C312312111111331312111133133313231333133313121211113313232233132313232313   >>      C312312111111331312111133133313231333133313121211113313232233132313232312   >>