C312312111133131212111133133313231333133313331333131211111211113313223311212121   >>    C31231211113313121211113313331323133313331333133313121111121111331322331121212   <<    C312312111133131212111133133313231333133313331333131211111211113313223311212123   >>      C312312111133131212111133133313231333133313331333131211111211113313223311212122   >>