will be you know Jonathan's covering that paper so the 2019 paper tube it's like a NS paper by a thousand at all investigated exactly that assumption so we'll see bar that but the notion down if you already put bits on your bit stream from encoding the previous symbol previously previous symbol and you'd work with those bits is that really a deficient or real the question is all those bits really random enough to achieve the efficiency that we declare here and so chuckling we'll get to that question maybe five or six slides for