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 attends PersonY school
Hypothesis: As a result, PersonX wants to be friends with PersonY
Update: PersonX wants to be more outgoing
Example Output: strengthener

Example Input: Premise: PersonX joins a gang
Hypothesis: PersonX is seen as worthy
Update: PersonX refuses to kill.
Example Output: weakener

Example Input: Premise: PersonX is short on money
Hypothesis: As a result, PersonX wants to be better at saving
Update: PersonX spends a lot of money.
Example Output:
strengthener