I'll walk around the studio, and I just ask people. Hey, try this. Try this. It's not the complete game. It's just like a mini feature. And, try this uh, try this feature. Uh, how did you find it? How would you improve it? And, then I write all the feedback down. And, I come back and I do a new prototype. There are so many tools to do a rapid prototype like this. Uh, so this is what - what we do. Because, nobody has the perfect recipe for this. So, um, and your target audience is everyone. So, you have to walk around and talk to everyone. And, make sure that everyone understands your - your prototype.