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 throws water
Hypothesis: PersonX then throws more
Update: PersonX started a water fight.
Example Output: strengthener

Example Input: Premise: PersonX sells the car
Hypothesis: PersonX is seen as happy
Update: The car is an heirloom
Example Output: weakener

Example Input: Premise: PersonX loves to eat
Hypothesis: As a result, PersonX feels gluttonous
Update: They only eat once per day
Example Output:
weakener