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 makes PersonX's entry
Hypothesis: PersonX then cheered
Update: PersonX is scheduled to congratulate the winning football team.
Example Output: strengthener

Example Input: Premise: PersonX sells the house
Hypothesis: Then, he moves
Update: PersonX looks forward to living in his new home.
Example Output:
strengthener