C312312111133131212111133133313231333133313331333133311212111113331322212121   >>    C31231211113313121211113313331323133313331333133313331121211111333132221212   <<    C312312111133131212111133133313231333133313331333133311212111113331322212123   >>      C312312111133131212111133133313231333133313331333133311212111113331322212122   >>