In this task, you are given a premise, a hypothesis, and an update. The premise sentence describes a real-world situation and is always assumed to be true. The hypothesis sentence describes an assumption or inference that you might make about that situation having read the premise. The update provides additional information about the situation that might weaken or strengthen the hypothesis. A weakener is a statement that weakens the hypothesis, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.

Ex Input:
Premise: What a pretty red convertible was in the parade that night.
Hypothesis: The convertible top was down.
Update: It was a balmy, starry night.

Ex Output:
strengthener


Ex Input:
Premise: A boy in a black shirt punches a yellow punching bag while a boy in a blue sweatshirt holds the bag.
Hypothesis: Two boys take turns using a punching bag.
Update: They are both training.

Ex Output:
strengthener


Ex Input:
Premise: Two men playing stringed instruments.
Hypothesis: Two guys are preparing for a concert.
Update: An audience watches the men.

Ex Output:

weakener