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 checks PersonX's pockets
Hypothesis: PersonX then thinks about what to buy
Update: PersonX finds her wallet.
Example Output: strengthener

Example Input: Premise: PersonX is a fun day
Hypothesis: PersonX then gets a birthday gift
Update: PersonX was on a vacation.
Example Output: weakener

Example Input: Premise: PersonX takes PersonY to the station
Hypothesis: PersonX is seen as loyal
Update: It is the middle of the night
Example Output:
strengthener