text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
  Created on Thu Mar  2 04:53:57 2017
  
  @author: Venusgrape
  
  Printing Out the User's Guess
  10.0 points possible (graded)
  Next, implement the function getGuessedWord that takes in two parameters - a string, secretWord, and a list of letters, lettersGuessed. 
  This function returns a string that is comprised of letters and underscores, based on what letters in lettersGuessed are in secretWord. 
  This shouldn't be too different from isWordGuessed!
  
  Example Usage:
  
  >>> secretWord = 'apple' 
  >>> lettersGuessed = ['e', 'i', 'k', 'p', 'r', 's']
  >>> print(getGuessedWord(secretWord, lettersGuessed))
  '_ pp_ e'
  When inserting underscores into your string, it's a good idea to add at least a space after each one, so it's clear to the user
  how many unguessed letters are left in the string (compare the readability of ____ with _ _ _ _ ). This is called usability - it's 
  very important, when programming, to consider the usability of your program. If users find your program difficult to understand or 
  operate, they won't use it!
  
  For this problem, you are free to use spacing in any way you wish - our grader will only check that the letters and underscores 
  are in the proper order; it will not look at spacing. We do encourage you to think about usability when designing.
  
  For this function, you may assume that all the letters in secretWord and lettersGuessed are lowercase.
  
  """
  
  def getGuessedWord(secretWord, lettersGuessed):
      '''
      secretWord: string, the word the user is guessing
      lettersGuessed: list, what letters have been guessed so far
      returns: string, comprised of letters and underscores that represents
        what letters in secretWord have been guessed so far.
      '''
      # FILL IN YOUR CODE HERE...
      s_len = len(secretWord)
      str_output = ''
      for i in range(s_len):
          if secretWord[i] in lettersGuessed:
              str_output += secretWord[i]
          else:
              str_output += '_ '
  
      return str_output