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 turns PersonY's head to look at PersonY
Hypothesis: As a result, PersonX feels careless
Update: PersonX crashes into a pole.
Example Output: strengthener

Example Input: Premise: PersonX feels like going
Hypothesis: Because PersonX wanted to do something elsewhere
Update: PersonX is agoraphobic and hates leavning their house.
Example Output: weakener

Example Input: Premise: PersonX rests PersonY's elbows
Hypothesis: PersonX is seen as rested from exhaustion
Update: Person X is sweating profusely and sighing a lot.
Example Output:
strengthener