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 lets PersonY explain
Hypothesis: PersonX is seen as satisfied.
Update: PersonY had a good explanation
Example Output: strengthener

Example Input: Premise: PersonX rolls on PersonY's back
Hypothesis: PersonX is seen as in control
Update: PersonY taps out
Example Output: strengthener

Example Input: Premise: PersonX howls in pain
Hypothesis: PersonX then eventually feels better again
Update: PersonX is transported by ambulance to the hospital.
Example Output:
strengthener