$.$ Write a function called pig$\_$latin$()$ that takes a word and converts the word to Pig Latin.

This function takes a string, and returns a string. That is$,$ it takes the first letter off the front of a

word and places it at the end of the word followed by the letters $\text{'}$ay$\text{'}.$ However, if the first letter

is a vowel, then it's not moved to the end, but you still at $\text{'}$ay$\text{'}$ to the end of the word.

Signature:

def pig$\_$latin$($word$)$:

# your code here

return

Assumptions: The word is non$-$empty.

Examples:

pig$\_$latin$(\text{'}$weekend$\text{'})->$ 'eekendway' #eekendway

pig$\_$latin$(\text{'}$coffee$\text{'})->$ 'offeecay' #offeecay

pig$\_$latin$(\text{'}$indoors$\text{'})->$ 'indoorsay' #indoorsay