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 person is laying in the grass in front of the ocean.
Hypothesis: The person is having a picnic.
Update: The person has a basket and a blanket.
Example Output: strengthener

Example Input: Premise: Dancers a standing on a sidewalk.
Hypothesis: Some dancers are waiting for the bus.
Update: The dancers are headed on a tour.
Example Output: strengthener

Example Input: Premise: A man in an orange vest is working on a train.
Hypothesis: The train will head to Vermont once fixed.
Update: The man is from the midwest.
Example Output:
weakener