input: def count_vowels(string: str) -> int:
      """ Count the total number of vowels in the given string.
      >>> count_vowels('Hello World')
      3
      >>> count_vowels('Python Programming')
      4
      """
      vowels = "aeiouAEIOU"
      count = 0
      for s in string:
          if s in vowels:
              count += 1
      return count
output:     vowels = "aeiouAEIOU"
      count = 0
      for s in string:
          if s in vowels:
              count += 1
      return count