Индекс строки выше заданного значения

import random
HANG = ('''\n''',
        ''''  _____
 |     |
 |     
 |    
 |     
 |    
/_\\''',
        '''  _____
 |     |
 |     O
 |    
 |    
 |    
/_\\''',
        '''  _____
 |     |
 |     O
 |     |
 |     
 |    
/_\\''',
        '''  _____
 |     |
 |     O
 |    /|
 |     
 |    
/_\\''',
        '''  _____
 |     |
 |     O
 |    /|\\
 |    
 |    
/_\\''',
        '''  _____
 |     |
 |     O
 |    /|\\
 |     |
 |    
/_\\''',
        '''  _____
 |     |
 |     O
 |    /|\\
 |     |
 |    /
/_\\''',
        '''  _____
 |     |
 |     O
 |    /|\\
 |     |
 |    / \\
/_\\''')
MAX_WRONG = len(HANG) - 1
WORDS = ('WORD', 'WORKOUT')
word = random.choice(WORDS)
was = '-' * len(word)
wrong = 0
used = []
print('Game HANGMAN. Good luck!')
while wrong < MAX_WRONG and was != word:
    print(HANG[wrong])
    print('Letters, which you used:', used)
    print('Main word:', was)
    guess = input('Enter letter: ')
    guess = guess.upper()
    while guess in used:
        print('You had this letter before:', guess)
        guess = input('Enter letter: ')
        guess = guess.upper()
    used.append(guess)
    if guess in word:
        print('Right!', guess, 'is in word!')
        n = ''
        for i in range(len(word)):
            if guess == word[i]:
                n += guess
            else:
                n += was[i]
            was = n
    else:
        print('Wrong,', guess, 'isn\'t in the word')
        wrong += 1
if wrong == MAX_WRONG:
    print(HANG[wrong])
    print('So sad :\'(')
    print('It was', word)
else:
    print('Wow, it\'s really', word + '!')
input('Press any key to continue...')