human
Solve the following python programming problem given the following code:
def authorize_same_container(account_to_match, container_to_match) : 
    def auth_callback_same_container(req) : 
        try : 
            (_ver, acc, con, _rest) = req.split_path (3, 4, True) 
except ValueError : 
            return HTTPUnauthorized (request = req) 
if ((acc == account_to_match) and (con == container_to_match)) : 
            return None 
else : 
            return HTTPUnauthorized (request = req) 
return <MASK> 
    
    Given the code above, what is a proper replacement for <MASK>? Choose among: account_to_match, container_to_match
assistant
#Here is a proper replacement for <MASK>.
def auth_callback_same_container(