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 takes the rest of the day off
Hypothesis: Because PersonX wanted to relax
Update: They worked a long shift already
Example Output: strengthener

Example Input: Premise: PersonX believes would lead
Hypothesis: PersonX then is surprised
Update: PersonX was just hired two weeks ago.
Example Output: weakener

Example Input: Premise: PersonX makes PersonY promises
Hypothesis: As a result, PersonX feels committed
Update: PersonY doesn't trust PersonX.
Example Output:
weakener