Every valid email consists of a local name and a domain name, separated by the '@' sign. Besides lowercase letters, the email may contain one or more '.' or '+' characters.

For example, in the email "alice@leetcode.com", "alice" is the local name, and "leetcode.com" is the domain name.

If you add periods '.' between some characters in the local name part of an email address, mail sent there will be forwarded to the same address without dots in the local name. Note that this rule does not apply to domain names.

If you add a plus '+' in the local name, everything after the first plus sign will be ignored. This allows certain emails to be filtered. Note that this rule does not apply to domain names.

It is possible to use both of these rules at the same time.

Given an array of strings emails where we send one email to each emails[i], return the number of different addresses that actually receive mails.

Constraints:

• $1 \leq$ emails.length $\leq 100$

• $1 \leq$ emails[i].length $\leq 100$

• emails[i] consists of lowercase English letters, '+', '.', and '@'.

• Each emails[i] contains exactly $1$ '@' character.

• All local and domain names are non-empty.

• Local names do not start with a '+' character.

• Domain names end with the ".com" suffix.

• Domain names must contain at least $1$ character before the ".com" suffix.

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.