I would say each of us has done pretty like we've covered different areas. So I have co-taught intro to AI first, then machine learning. And then most recently I was we had CA of the CSD for anyone,. A computer vision, geometry and something class that was actually getting revamped. In your cases you had also kind of hadCA or pretty major roles in your perspective classes. Yeah, that's right. Good to know. I didn't realize we had so good.