You are given a personal information string s, which represents either an email address or a phone number. Return the masked personal information according to the following rules:

Email address:

An email address consists of a local name, an '@' symbol, and a domain name. To mask an email:

1. Convert all uppercase letters in both the local name and the domain name to lowercase.

2. Replace all characters between the first and last character of the local name with $5$ asterisks "*****".

Phone number:

A phone number consists of $10$ to $13$ digits, separated by possible formatting characters such as spaces, '(', ')', '-', and '+'. The last $10$ digits always form the local phone number, and any digits before them form the country code (ranging from $0$ to $3$ digits). To mask a phone number:

1. Remove all separation characters, keeping only the digits.

2. The local number is masked as "***-***-XXXX", where "XXXX" represents the last $4$ digits of the original phone number.

3. If a country code is present ($1$, $2$, or $3$ digits), prepend "+*-", "+**-", or "+***-" respectively to the masked local number.

Constraints:

• s is either a valid email address or a phone number.

• If s is an email:

  • $8 \leq$ s.length $\leq 40$

  • s consists of uppercase and lowercase English letters, exactly one '@' symbol, and exactly one '.' symbol.

• If s is a phone number:

  • $10 \leq$ s.length $\leq 20$

  • s consists of digits, spaces, and the symbols '(', ')', '-', and '+'.

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.