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 warns PersonY
Hypothesis: PersonX is seen as concerned
Update: PersonX goes specifically to PersonY
Example Output: strengthener

Example Input: Premise: PersonX likes to cook
Hypothesis: PersonX then takes a lesson
Update: They hate being taught
Example Output: weakener

Example Input: Premise: PersonX buys a birthday cake
Hypothesis: As a result, PersonX feels prepared
Update: PersonX forgot about the birthday.
Example Output:
weakener