input: 
  def select_words(s, n):
      """Given a string s and a natural number n, you have been tasked to implement 
      a function that returns a list of all words from string s that contain exactly 
      n consonants, in order these words appear in the string s.
      If the string s is empty then the function should return an empty list.
      Note: you may assume the input string contains only letters and spaces.
      Examples:
      select_words("Mary had a little lamb", 4) ==> ["little"]
      select_words("Mary had a little lamb", 3) ==> ["Mary", "lamb"]
      select_words("simple white space", 2) ==> []
      select_words("Hello world", 4) ==> ["world"]
      select_words("Uncle sam", 3) ==> ["Uncle"]
      """
  
output:     words = s.split()
      consonants = "bcdfghjklmnpqrstvwxyzBCDFGHJKLMNPQRSTVWXYZ"
      result = []
      
      for word in words:
          consonant_count = sum(1 for char in word if char in consonants)
          if consonant_count == n:
              result.append(word)
      
      return result