Adding 'Hello' to the beginning of a string

Given a string, return a new string with 'Hello' added to the beginning of the string. Otherwise return the string as it is.

Sample Code:

def sayHello(s):
# Enter your logic here...

Examples:

Input: 'World'
Output: 'Hello, World!'
Explanation: 'Hello, ' has been added to the input.

Input: 'Hello, World'
Output: 'Hello, World!'
Explanation: The input already has a 'Hello, '.