C111123313121111121111331333133313331311331333131211113313331333133311212323231   >>    C11112331312111112111133133313331333131133133313121111331333133313331121232323   <<    C111123313121111121111331333133313331311331333131211113313331333133311212323233   >>      C111123313121111121111331333133313331311331333131211113313331333133311212323232   >>