def get_guess(guesses):
	"""
	This function will get the user's guess.
	"""
	# Get the user's guess.
	guess = input("------\nGuess a letter: ")

	# Check if the user has already guessed the letter.
	if guess in guesses:
		print("You've already guessed that letter.")
		return get_guess(guesses)

	# Return the guess.
	return guess