Based on the German text, your friend is talking about Lisa's cat (Tatze) giving birth to 3 kittens (Junge). So you can congratulate your friend by saying something like "Congratulations to Lisa on her new 3 kittens!" To break it down: - "Tatze" means "paw" but is sometimes used as a term of endearment for a cat - "Junge" in this context means "kittens" - The text says the cat had 3 kittens, which look very cute