I'm not sure if it's fair to give it buggy code, but I just changed set(b) to set(d) in the example, and it doesn't realise there's a problem: https://whatdoest

I'm not sure if it's fair to give it buggy code, but I just changed set(b) to set(d) in the example, and it doesn't realise there's a problem: https://whatdoesthiscodedo.com/g/517c50a https://whatdoesthiscodedo.com/g/517c50a