variables at the very first step rather you you just need to decode one of them and then you get some you can add more to the bit stream and then decode more and so on and what that means is that you need fewer auxiliary bits to start bits back coding so what this means is that remember before BBN has to make sense you need a bit stream with some bits on it to even sample Z in the first place and those bits must be sent across and if you you don't have any and if there are no bits there then you end up wasting them and so if you're able to