C312312111133131212111133133313231333133313331331121111331311233132213221   >>    C31231211113313121211113313331323133313331333133112111133131123313221322   <<    C312312111133131212111133133313231333133313331331121111331311233132213223   >>      C312312111133131212111133133313231333133313331331121111331311233132213222   >>