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, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.

Example Input: Premise: A biker is racing downhill.
Hypothesis: driving competetion is going on
Update: Police officers on bikes are chasing the person
Example Output: weakener

Example Input: Premise: A boy standing next to a small field fire and a boy running away from it.
Hypothesis: The boy is running from the field fire to get help.
Update: The is waving his hands and yelling.
Example Output: strengthener

Example Input: Premise: A group of people gathered for a meeting.
Hypothesis: A group of people held a business meeting.
Update: They are wearing business clothes.
Example Output:
strengthener