If the guess is correct it will replace the letter with '-'. in the for loop how can i store the previous result and do a update with the new result? 

```
import random

WORDS = ('linux', 'windows')
correct_word = random.choice(WORDS)

for n in range(5):
    guess = input('Enter a letter: ')
    letter = ''.join(x if x in guess else '-' for x in correct_word)

    if letter in correct_word:
        print("So far you have: ", letter)

    else:
        print("So far you have: ", letter)

```