How do you know all te kittens are out?

As a large language model, I don't have physical senses like sight or hearing. I can't see or hear kittens.

To know if all the kittens are out, you would need to:

* Visually check the area: Look carefully in every nook and cranny where a kitten might be hiding.

* Listen for meows: Kittens often meow when they are separated from their mother or littermates.

* Use a flashlight: Shine a flashlight into dark corners to see if there are any kittens hiding.

If you're still unsure, it's best to consult with a veterinarian or animal shelter. They can help you find any hidden kittens and ensure their safety.