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 feels grateful
Hypothesis: PersonX then closes eyes
Update: PersonX feels relieved.
Example Output: strengthener

Example Input: Premise: PersonX opens a new bank account
Hypothesis: Because PersonX wanted to get a better deal
Update: X compared interest rates among local banks.
Example Output: strengthener

Example Input: Premise: PersonX immediately opened
Hypothesis: As a result, PersonX wants to interact with what's inside
Update: PersonX doesn't look happy with the gift.
Example Output:
weakener