text: """
  Exercise 3
  Write a function named avoids that takes a word and a string of
  forbidden letters, and that returns True if the word doesnt use any
  of the forbidden letters.
  """
  
  
  def avoids(word, string):
      for letter in string:
          if letter in word:
              return False
      return True
  
  
  print(avoids("adam", "madam"))
  print(avoids("zumbe", "gandhi"))
  