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 carefully followed
Hypothesis: PersonX is seen as anxious
Update: PersonX is shaking and sweating
Example Output: strengthener

Example Input: Premise: PersonX performs PersonX's part
Hypothesis: PersonX then gains confidence
Update: PersonX wins a large pot of money.
Example Output: strengthener

Example Input: Premise: PersonX gets PersonX's test
Hypothesis: PersonX is seen as nervous
Update: PersonX's heart is racing fast.
Example Output:
strengthener