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 buys a guitar
Hypothesis: PersonX is seen as happy
Update: The guitar came broken
Example Output: weakener

Example Input: Premise: PersonX helps PersonY remember
Hypothesis: As a result, PersonX wants to mend person y's cuts
Update: PersonX is afraid of blood.
Example Output: weakener

Example Input: Premise: PersonX eats PersonX's hat
Hypothesis: As a result, PersonX wants vomit
Update: The hat was made of dirty hay.
Example Output:
strengthener