19:53 No, absolutely, look we talk about our backlog every home, every week. So I would say the absence of a mortgage company has almost nothing to do with visibility into our backlog, we have extraordinary visibility and we are constantly looking at that portion that is locked, that portion that's not locked and we are foreseeing our teams and our outside Choice lender partners to look at where the breakpoints are where those customers may be in trouble from a qualification standpoint. And to the extent that they're not going to qualify up 10, 20, 30, 40, 50 basis points, there is an absolute discussion about, it's time to walk or we are taking a risk, and you're taking a risk that is untenable. 20:35 So that's why I said, we've gone through that, it’s been a consistent practice, but we really formalized in the first calendar quarter, and I was excited that we had very, very, very little drop out from the backlog. But yes, I think that there are pluses and minuses and I can certainly understand what others say about their mortgage companies giving them visibility. But I would tell you I don't apologize to anybody ever about lack of visibility in our backlog. We have extraordinary visibility and we get to have our lenders with that backlog that's not yet committed and frankly, even when they are committed, they can still switch lenders until roughly 60 days out from closing, that keeps the pricing really tight, right? 21:20 I -- if markets move and there is a better rate available our customer can move and our lenders, know that we will do that. Now we only are able to do that, because we don't charge them, right? And that's the benefit of Mortgage Choice in a nutshell.