'''
Write a function that takes a list as input. The list will contain single letters.
For example, a possible input is ["h", "e", "l", "l", "o"]. 
An invalid input would be ["he", "l", "l", "o"]. The function will return the string
that is made of all the elemtns of the list. For example, the output of the list 
["h", "e", "l", "l", "o"] would be "hello".
'''

def combineLetters():
    return
    