input: 
  def filter_vowels(string: str) -> str:
       """
       Filters out all the vowels from a given string and returns the modified string.
       >>> filter_vowels('Hello World')
       'Hll Wrld'
       >>> filter_vowels('Python Programming')
       'Pythn Prgrmmng'
       """
       vowels = ('a', 'e', 'i', 'o', 'u')
       return ''.join(c for c in string if c.lower() not in vowels)
  
output:     vowels = ('a', 'e', 'i', 'o', 'u')
      return ''.join(c for c in string if c.lower() not in vowels)