 Andrew and Sean, I appreciate it. So, Andrew, I wanted to give you a couple minutes just to describe, I guess, I was going to ask you about the 4P program, but you seemed to indicate to me it's more accurate to just say the GSA algorithm. What is that? Yeah, so basically GSA a number of years ago started rolling out the 4P pricing tool, and that had its own algorithm at the time. And so that name, I think, is carried through, and a lot of people refer to it. But really the most important thing is that basically 4P,