C312312111133131212111133133313231333133313331333133311212111113232213221   >>    C31231211113313121211113313331323133313331333133313331121211111323221322   <<    C312312111133131212111133133313231333133313331333133311212111113232213223   >>      C312312111133131212111133133313231333133313331333133311212111113232213222   >>