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 group of workers are waiting to be picked up.
Hypothesis: A group of workers are waiting for a ride to their meeting while checking their watches.
Update: they stare at the clock on the tower.
Example Output: weakener

Example Input: Premise: An important man with his crew walking on the field at a sporting event.
Hypothesis: The group of workers inspect the damaged field.
Update: One of the workers stops to make a note on his clipboard.
Example Output: strengthener

Example Input: Premise: The dog is chasing the goat around the yard.
Hypothesis: The dog and goat are friends.
Update: The dog is snapping its jaw and foaming at the mouth.
Example Output:
weakener