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 looks at PersonY's hands
Hypothesis: PersonX is seen as mystic
Update: PersonX is wearing a pinstripe suit.
Example Output: weakener

Example Input: Premise: PersonX makes the decision
Hypothesis: As a result, PersonX feels decisive
Update: They decided in minutes
Example Output: strengthener

Example Input: Premise: PersonX improves PersonX's health
Hypothesis: PersonX then loses weight
Update: PersonX went on a diet.
Example Output:
strengthener