roughly speaking on I mean - I think of a few details to be sure it's exactly true but they don't give you a pretty good estimate of what the optimal encoding might be and we'll look at a few examples soon like three slides from now we'll get to a few more things that touch upon exactly what you're asking about really good question other questions okay let's move on then so a couple of coding considerations we want to look at here what happens when your frequent accounts or maybe some more complicated estimate the distribution over symbols