C312312111133131212111133133313231333133313331331121111331311233132323231   >>    C31231211113313121211113313331323133313331333133112111133131123313232323   <<    C312312111133131212111133133313231333133313331331121111331311233132323233   >>      C312312111133131212111133133313231333133313331331121111331311233132323232   >>