C312312111133131212111133133313231333133313331333121111121111113322123213223311   >>    C31231211113313121211113313331323133313331333133312111112111111332212321322331   <<    C312312111133131212111133133313231333133313331333121111121111113322123213223313   >>      C312312111133131212111133133313231333133313331333121111121111113322123213223312   >>