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 keeps PersonY from starving
Hypothesis: Before, PersonX needed to find food
Update: PersonX's refrigerator appeared to be full.
Example Output: weakener

Example Input: Premise: PersonX causes the smell
Hypothesis: PersonX then begins to smell
Update: PersonX throws a rotten egg off the side of a building.
Example Output: weakener

Example Input: Premise: PersonX proves PersonY's point
Hypothesis: Before, PersonX needed to observe PersonY's point
Update: PersonY is watching PersonX on a security camera.
Example Output:
weakener