Your code will be calling the inner function despite no arguments passed in due to how the conditional statement is setup, it should instead retrieve stored keys from the cache. (You already display the key to the console, so you should be able to read the logs and understand the reasoning)

JS: random tests are missing their it subfunction

think about the kind of datastructure you need (and that's ofc not a 2D array)

Any tips to solve this question? Im stucked