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: A woman serving a tennis ball.
Hypothesis: A woman is playing tennis with her husband.
Update: She has a basket of balls to practice with alone.

Ex Output:
weakener


Ex Input:
Premise: One man is sleeping, the other is jumping on his bed, both are wearing white and look to be on Indian descent.
Hypothesis: The men are brothers who share a bedroom.
Update: The men are in a house owned by people they're both related to.

Ex Output:
strengthener


Ex Input:
Premise: Person with blue jacket windsailing with blue, white and orange sail over snow and rock front.
Hypothesis: A man is outside
Update: The wind whips the person's hair to and fro.

Ex Output:

strengthener