Thanks! I will still need to try this out, but the idea (in your first response) kind of feels more or less like what I knew I needed. I have so many questions now based on the responses so far - it feels like I'm just scratching the surface! Firstly, could you explain the differences between map, list, and set? Secondly, when you reduced it to a single line, you implemented "cap" and "next".... I've seen these mentioned before, but don't really get it...
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