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. It makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis. It makes you much more likely to believe the hypothesis is true. Your task is to output 'strengthener' or 'weakener' if the update strengths or weakens the hypothesis, respectively.

Ex Input:
Premise: PersonX meets PersonY's friends
Hypothesis: PersonX then is rejected
Update: PersonY's friends invite PersonX to join their club.

Ex Output:
weakener


Ex Input:
Premise: PersonX bleeds a lot
Hypothesis: As a result, PersonX feels injured
Update: They lost a leg

Ex Output:
strengthener


Ex Input:
Premise: PersonX has a pet cat
Hypothesis: Before, PersonX needed to purchase the pet
Update: The person lives under a bridge

Ex Output:
weakener