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 gives tom
Hypothesis: Before, PersonX needed to have something to give
Update: X passes along his knowledge.
Example Output: strengthener

Example Input: Premise: PersonX feels grateful
Hypothesis: PersonX then closes eyes
Update: PersonX feels relieved.
Example Output: strengthener

Example Input: Premise: PersonX camps with PersonY's friends
Hypothesis: Before, PersonX needed to plan a camping trip and invite friends
Update: PersonX wanted to get to know PersonY's friends better.
Example Output:
strengthener