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 studies extra hard
Hypothesis: PersonX then gains knowledge
Update: PersonX enjoyed the reading.
Example Output: strengthener

Example Input: Premise: PersonX unloads the groceries
Hypothesis: PersonX is seen as like she's done a great job
Update: PersonX wanted to help the elderly.
Example Output: strengthener

Example Input: Premise: PersonX surprises PersonY with tickets
Hypothesis: PersonX then takes delight in giving
Update: They are really excited to get the tickets
Example Output:
strengthener