existing pair with an initial just a bite like the iron and the G yeah yeah when do you stop so yeah that's a good question usually you have a heuristic for merging only across or only within words so you won't merge across like word boundaries with like whitespace or things like that and that just helps with efficiency because otherwise you'll start wasting emerges on things like you know come in like pairs of you know maybe fill our words or stop words and the other thing is you you could just in the limit run