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 enjoys every minute
Hypothesis: PersonX then rests after dancing his heart out
Update: PersonX is wearing sensible shoes
Example Output: strengthener

Example Input: Premise: PersonX tells on PersonY
Hypothesis: As a result, PersonX feels manipulative
Update: PersonX promised PersonY they wouldn't tell
Example Output: strengthener

Example Input: Premise: PersonX goes to PersonY 's
Hypothesis: Before, PersonX needed to figure out the address
Update: They are best friends with them
Example Output:
weakener