While scavenging advanced scratch projects for any ideas on how to create the best possible parser, I found this... This block can't be found in Control Where did it come from and how did they get it???
The block itself is inside of this project. Just like I backpacked it from the project I scavenged, you should also be able to backpack it yourself. I assume it initiates the code inside every time it finds the exact same string of letters or numbers as the variable in any list.