Well, Drew, this is Tom. We are indeed looking at a multiyear time horizon and we have to. I mean, we've got decisions to make today that will impact 2018, 2019. We have to collect the science and do the spacing pilots in order to come up with prudent development plans. We don't know what ultimate spacing will be. I mean John talked about 80 acre spacing. He talked about 105 acre spacing. Today, we can't tell you that it's not 40 acre spacing. We just don't know until we go out there and test it. And we're looking carefully at competitors, but right now we're not throwing a lot of spacing pilots going on the Delaware Basin, other than our four. We have one competitor doing another space pilot issue, but we're having to create these data points to setup our out years. So we have to do the science required for out year developments. We have to build the infrastructure and we have to club the financing plan. So we are looking at that year at out years. You asked about Culberson County, overall in the Basin, we're on a glide path to hold all of our acreage, certainly all of that we see perspective, which is darn near every acres. And that's a very manageable program. If we do the minimum, it would probably be $350 million a year for the next few years, but we're accelerating that and we'll front load that, so we can get that held earlier. Your question also was about Culberson County and Wolfcamp A, Wolfcamp C, Wolfcamp D. It depends by large on the lease. Some of our leases, we can hold all Wolfcamp with one well, so we can choose the zone. Other leases, we have to drill the deepest target first in order to hole the deepest interval, but a lot's changed since we have gone into this project, and one of which there was a day when we would have said, we think the Wolfcamp A is our most economic target. Today, we don't know. That Montrose well was landed to Wolfcamp D. And it's arguably the best economics of any well we've drilled in basin. And so we don't know, if leases were a concern, I can't tell you today, which would be our primarily target. We've got a lot of experimentation with these long laterals and upside fracs, before we can make that kind of economic high-grade. And finally, you asked about future development. We do have a development plan and its changing everyday, based on these pilot projects, that's why we're doing them. We don't think we're going to have any issues with land going into full development, whether that would be Culberson Reeves or Ward we don't know today, but we're getting for it.