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 grows a beard
Hypothesis: As a result, PersonX wants keep it groomed
Update: PersonX works at a job where you need to be clean and groomed.
Example Output: strengthener

Example Input: Premise: PersonX ends PersonX's trip
Hypothesis: PersonX is seen as free to pursue other things
Update: PersonX is called back to work
Example Output: weakener

Example Input: Premise: PersonX quickly changed
Hypothesis: As a result, PersonX wants to walk to the car
Update: PersonX is wearing formal dinner wear.
Example Output:
strengthener