Write a function validateEmail$($emailAddr$)$ that takes emailAddr as a string and returns

True$/$False based on whether it is a valid email address or not. There are tons of rules that a

real valid email must satisfy but for the sake of simplicity we will check for only these rules:

Email address should not begin with $\text{'}.\text{'},\text{'}$#$\text{'},$ or $\text{'}$@$\text{'}$ symbols

Email address should not end with $\text{'}.\text{'},\text{'}$#$\text{'},$ or $\text{'}$@$\text{'}$ symbols

There should be only one @ symbol

The email address must have @ and $.$ characters somewhere inside it$.$

Each part of the email address must be at least $2$ characters long.

Write a function generatelogin$($first$,$ last, zipc$)$ that generates and returns a login name for a user

given their firstname, lastname and zipcode such that it has every other character of their first, last,

and zipcode in the respective order and returns this login name all in uppercase. See the following

example:

Input

Eirstname: Christopher

Lastname: Johnson

Zipcode: $10010$

Output $$ Generated login: CRSOHRJHSN$10$