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 gives PersonY a special gift
Hypothesis: PersonX is seen as delighted
Update: PersonX smiles happily while talking with personY
Example Output: strengthener

Example Input: Premise: PersonX sees PersonZ's friend PersonY
Hypothesis: As a result, PersonX wants to have a good time
Update: They're at a house party
Example Output: strengthener

Example Input: Premise: PersonX always tries
Hypothesis: As a result, PersonX feels optimistic
Update: PersonX has little to show for their effort.
Example Output:
weakener