C312312111111331312111133133313331322331333133313121111332223133311212121   >>    C31231211111133131211113313331333132233133313331312111133222313331121212   <<    C312312111111331312111133133313331322331333133313121111332223133311212123   >>      C312312111111331312111133133313331322331333133313121111332223133311212122   >>