You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
def code_generator(code_base):
    updated_code = []
    lines = code_base.splitlines()
    for line in lines:
        # Tokenize the line
        tokens = line.split(' ')

        # Find the tokens that need to be updated
        modified_tokens = [token for token in tokens if token.startswith('[') and token.endswith(']')]

        # Replace the tokens with new ones
        for token in modified_tokens:
            new_token = token.replace("[", "")
            new_token = new_token.replace("]", "")
            new_token = generate_new_token()
            line = line.replace(token, new_token)

        updated_code.append(line)
    return '\n'.join(updated_code)
    

def generate_new_token():
    return "<generated-token>"

code_base = '''
def foo(): 
    x = [test]
    y = [test2]
    
    return x + y
'''

print(code_generator(code_base))
user
def foo(): 
    x = <generated-token>
    y = <generated-token>
    
    return x + y
assistant