You are given an array of strings details, where each element represents information about a passenger. Each string details[i] has a length of $15$ characters and is formatted as follows:

• The first $10$ characters represent the passenger’s phone number.

• The $11^{ ext{th}}$ character denotes the passenger’s gender.

• The next $2$ characters represent the passenger’s age.

• The final $2$ characters indicate the assigned seat number.

Return the total number of passengers whose age is strictly greater than $60$.

Constraints:

• $1 \leq$ details.length $\leq 100$

• details[i].length $= 15$

• details[i] consists of digits from '0' to '9'.

• details[i][10] is either 'M', 'F', or 'O'.

• The phone numbers and seat numbers of the passengers are distinct.

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.