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 finds something to eat
Hypothesis: As a result, PersonX feels thankful
Update: PersonX has to eat dog food.
Example Output: weakener

Example Input: Premise: PersonX never been to one before
Hypothesis: As a result, PersonX feels interested
Update: PersonX is scared of it.
Example Output: weakener

Example Input: Premise: PersonX sleeps soundly
Hypothesis: Before, PersonX needed to not have their rest disturbed
Update: PersonX had to sleep fight the infection.
Example Output:
strengthener