Parul has been given a table which contains a list of e-mail addresses. She has been asked to find all the valid e-mail addresses in the list and put a tick mark in front of them. Help her in finishing the given assignment.

aditi_gupta@rediffmail.com
tanmay(45)@webmail.ac.in
www.jay-singh.com
rini@86india@yahoo.com
harsh.kumar@yahoo.co.in

The common rules for a valid email address are as follows:

1. Format: An email address must have a specific format: username@domain.com. The "@" symbol separates the username (before the "@" symbol) and the domain (after the "@" symbol).
2. Username Rules:
   • Must contain only letters (a-z), numbers (0-9), dots (.), hyphens (-), and underscores (_).
   • Cannot start or end with a dot.
   • Cannot have consecutive dots, hyphens, or underscores (e.g., "..", "--", "__").
   • Usernames are not case-sensitive.
3. Domain Rules:
   • Must contain at least one period (.), typically separating the domain name from the domain extension.
   • The domain name can contain letters, numbers, hyphens, and dots. It cannot start or end with a hyphen or dot.

Hence, the valid email addresses are: