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 reads PersonY's diary
Hypothesis: Before, PersonX needed to have Y’s diary
Update: PersonX is on the computer.
Example Output: weakener

Example Input: Premise: PersonX performs PersonX's duty
Hypothesis: As a result, PersonX feels efficient
Update: The boss of PersonX praises them
Example Output:
strengthener