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 puts PersonX's phone away
Hypothesis: As a result, PersonX feels tired
Update: Person X is getting ready to go to work.
Example Output: weakener

Example Input: Premise: PersonX reads the book
Hypothesis: As a result, PersonX wants to find more titles by the same author
Update: PersonX loved the book
Example Output: strengthener

Example Input: Premise: PersonX immediately ran
Hypothesis: As a result, PersonX feels athletic
Update: PersonX feels muscles building.
Example Output:
strengthener