When I got to SpaceX and progress in Python more, my job was now to think about the entire supply chain. And where that where Python came to fit with me on that one is it wasn't just set subtraction anymore. Now I needed to I had to think at a higher level. So how do I take not only this one rocket, but every single rocket that SpaceX is building and help someone play what I like to call rocket Tetris? The smallest piece that I had to plan with my software was the size of a refrigerator; then the rocket gets to 15 stores from that.