Given an integer array nums, return the most frequent even element. If there is a tie, return the smallest one. If no even element exists, return $-1$.

Constraints:

• $1 \leq$ nums.length $\leq 2000$

• $0 \leq$ nums[i] $\leq 10^5$

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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.