 Yeah. Or maybe even use some different components. Maybe we could just make a different material that still works like Portland cement, but is not Portland cement. And one of my early mentors was one of the women at Caltech who was leading the entrepreneurship program. Her name's Stephanie Janczynski. And she was like, well, you should go talk to customers. And we learned that it'd be very hard to enter the market with a novel cement.