Well, I guess there's a lot in that question. I would say first of all, in terms of our confidence for pricing next year, I mean we, as I said in my remarks, we're going to reflect any uncertainty that we see in [our bids] to ensure that there are, you know, any issues that we can contemplate here with respect to various scenarios that may play out, we would have considered in our bid. So, I think that's the first thing. So $21.50 you know, from a pricing perspective we feel very good about. We also feel good about the reiterating guidance that we provided today. I would say, relative to perhaps some of our peers, we have a much higher concentration of Medicare revenue. And Medicare claims, which I think in many respects, particularly in the revenue side have more volatility, but on the claim side as well, you're making assumptions about how seniors who have not used the health care system for a long time, how they're going to respond to the next, you know, call back half of the year. And in that regard, we just want to, we think it's appropriate to be cautious about how they might use the system in the back half of the year, especially as we saw, again, the depressed utilization in the fourth quarter, how does that all play through. And so that's, I think, appropriate caution. As we said, the sequester benefit is beneficial for obvious reasons. So, that is clearly a tailwind by understanding how impactful on our revenue numbers, the last fourth quarter was is still out there, in particular, because the way the mid-year payment works is it rolls forward, for the last six months of the year, in terms of how we get paid, and understanding of the documentation codes that were collected is something that we really need to understand, you know, both on existing members, as well as, frankly, new members. We get a lot of new members every year. Remember, it's not just the net growth, but it's just the number of new sales that we have. And so from that perspective, there's uncertainty there. Again, I feel pretty good about where we are today, but we don't think it would be appropriate to change our guide. The last point I'd make is, we came into the year committed to our 16% growth rate, which was above our target. And that's, you know, that's where we continue to be. We, you know versus perhaps some of our other peers, those numbers have not modified. And we obviously put out a number of ranges on a number of variables here, which, you know, are a reasonable amount of uncertainty starting from the fourth quarter. And as I mentioned that continues, but again, I think the first quarter is a good quarter, but there’s still ways to go.