Given an alphanumeric string s, return the second largest numerical digit found in s, or $-1$ if it does not exist.

Constraints:

• $1 \le$ s.length $\le 500$

• s consists of only lowercase English letters and digits.

Now, let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:

We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.

Implement your solution in the following coding playground.