input:     def count_vowels(string: str) -> int:
          """ Accepts a string as an input and returns the total number of vowels in the string
          >>> count_vowels('Hello World')
          3
          >>> count_vowels('Python is awesome!')
          6
          """
          vowels = "aeiou"
          count = 0
          for s in string:
              if s.lower() in vowels:
                  count += 1
          return count
output:     vowels = "aeiou"
      count = 0
      for s in string:
          if s.lower() in vowels:
              count += 1
      return count