C1111233131211111211113313331333133313331333133311221121111331333131133131211   >>    C111123313121111121111331333133313331333133313331122112111133133313113313121   <<    C1111233131211111211113313331333133313331333133311221121111331333131133131213   >>      C1111233131211111211113313331333133313331333133311221121111331333131133131212   >>