C312312111111331312111133133313331333121111331333133313331333132233132313221211   >>    C31231211111133131211113313331333133312111133133313331333133313223313231322121   <<    C312312111111331312111133133313331333121111331333133313331333132233132313221213   >>      C312312111111331312111133133313331333121111331333133313331333132233132313221212   >>