If you could figure out how to measure all relevant human space, in a way that is not invasive, that's real time, that's extremely accurate, on all the things that you just suggested start to become possible. Yes, it's a tetn ndred per cent. Do these exist on buses and subway cars yet? Like, do they have ther other companies that provide the uti ation or a number of people on a bus or a subway, or do they do that with clip boards to day too, and cameras? Yes. We're inmy lord, forty airports, or something like that, across the o s. And so like a lounge type situation might come