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

Example Input: Premise: PersonX learns fast
Hypothesis: Because PersonX wanted to pass the test.
Update: PersonX is playing basketball
Example Output: weakener

Example Input: Premise: PersonX commands PersonY army
Hypothesis: As a result, PersonX feels independant
Update: PersonX is a troop.
Example Output:
weakener