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.

Example Input: Premise: PersonX meets some new people
Hypothesis: Because PersonX wanted to make friends
Update: PersonX recently moved to a new city.
Example Output: strengthener

Example Input: Premise: PersonX casts PersonY's vote
Hypothesis: As a result, PersonX feels a fraud
Update: PersonY has a broken arm.
Example Output: weakener

Example Input: Premise: PersonX has a pet cat
Hypothesis: Before, PersonX needed to purchase the pet
Update: The person has family working at an animal shelter
Example Output:
strengthener