I don&#x27;t understand, what is the input and output of this at a conceptual level?<p>One of the examples apparently takes a list of leaked passwords from MySpace - and so what does it &quot;crack&quot; then? I think the phrase &quot;high impact substrings&quot; down in the explanation is the key, but it&#x27;s not wholly clear to me what the ultimate purpose of this is.<p>The &#x27;GA without a fitness score&#x27; idea seems interesting, but it would help to know what exactly the algorithm is trying to do.