Given a string s, you may prepend any number of characters to the front of s to make it a palindrome.

Return the shortest palindrome that can be formed by only prepending characters to s.

Constraints:

• $0 \leq$ s.length $\leq 5 \times 10^4$

• s consists of lowercase English letters only

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.