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 listens to PersonX's music
Hypothesis: PersonX is seen as happy
Update: PersonX taps their foot and sings along.
Example Output: strengthener

Example Input: Premise: PersonX speaks with PersonY
Hypothesis: Before, PersonX needed locate y
Update: PersonX walked to PersonY's house.
Example Output: strengthener

Example Input: Premise: PersonX takes PersonY's toddler
Hypothesis: PersonX is seen as mischevious
Update: PersonY was not looking when it happened.
Example Output:
strengthener