Love that German precision.
"99 luft balons", good thing they defined them as luft balons, otherwise we might have confused them with "99 wasser balons".
1. Ballon has two "l" in German.
2. The compound word is Luftballon. It's one word.
3. A "water balloon" (toy) is called a Wasserbombe (water bomb) in German. The same word is used for a depth charge. Where is the precision now?