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 looks back at PersonY
Hypothesis: As a result, PersonX feels curious
Update: PersonY gives PersonX a wave.
Example Output: weakener

Example Input: Premise: PersonX bullies at school
Hypothesis: As a result, PersonX wants tO GET PUNISHMENT
Update: PersonX challenges the teacher to a fight.
Example Output: strengthener

Example Input: Premise: PersonX brings the kitten home
Hypothesis: As a result, PersonX wants feed the kitten
Update: The kitten is meowing with hunger.
Example Output:
strengthener