Ryan, this is Bill. Certainly, we have a very decentralized exploration effort. All seven of our domestic divisions have very strong exploration staff. So we’re working, literally every basin, in the U.S., probably not a well being drilled. We don’t know something about. And so, we’re leasing in multiple plays this year at very low cost. And we believe the prospects that we're leasing on have premium economic potential due to the rock quality as Ezra talked about. And so, some of them are in basins that have had a lot of historical production, some of them are in places where there's not really much historic production at all. But they're all very high quality. And the size of the prospects we're working on, we use an example, couple of years ago, we talked about the Woodford oil play we introduced. That's about 200 million barrels of net EOG. That's kind of on the small size. So we're not looking for things smaller than that. But 200 million barrels, net to a company, discovery of that top anywhere in the world is very significant. So, last year, we announced two new plays in the Powder River Basin that totaled 1.9 billion barrels. So that's a very large one. So that's a good way to put the brackets on the size of them. But the good thing is, as Ezra talked about, we believe we can continue, and it'll organically generate significant prospects potential in the future. And added at very, very low cost, much, much lower costs than doing M&As. And so when we do these bolt-on acquisitions, there are large amounts of acreage are very, very low cost, and very, very high potential in our mind. And so we've been generating premium inventory twice as fast as we've been drilling it. And the quality of our inventory is going up at the same time. So some of the previous questions are based on, is EOG's inventory quality declining? And I can tell you-- we can tell you with absolute confidence that we believe our inventory quality will continue to improve. So the quality is going up. And we're not having any problem replacing at much faster than we’re drilling it.