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 has just moved into a new house
Hypothesis: Before, PersonX needed to sell old house
Update: PersonX has never lived alone before
Example Output: weakener

Example Input: Premise: PersonX gets a replacement
Hypothesis: PersonX is seen as satisfied
Update: The replacement works flawlessly.
Example Output: strengthener

Example Input: Premise: PersonX sees a horror movie
Hypothesis: PersonX is seen as frightened
Update: PersonX is shaking and covering their eyes
Example Output:
strengthener