Please do not copy and paste from previous Chegg answers

Write a python program that takes a string from the user and checks if the string is a valid email. A valid email address consists of an email prefix, @ and an email domain, both in acceptable formats:Prefix: WITHOUT USING REGULAR EXPRESSIONS

Allowed characters: letters (a-z), numbers, underscores, periods, and dashes.

An underscore, period, or dash must be followed by one or more letter or number.

Spaces and other special characters are not allowed.

Domain:

Allowed characters: letters (a-z), numbers, underscores, periods, and dashes.

An underscore, period, or dash must be followed by one or more letter or number.

Spaces and other special characters are not allowed.

WITHOUT USING REGULAR EXPRESSIONS