C312312111133131212111133133313231333133313331333133311212123321   >>    C31231211113313121211113313331323133313331333133313331121212332   <<    C312312111133131212111133133313231333133313331333133311212123323   >>      C312312111133131212111133133313231333133313331333133311212123322   >>