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.

Ex Input:
Premise: An Asian man performing on a stage.
Hypothesis: A man singing.
Update: The man performs an opera aria.

Ex Output:
strengthener


Ex Input:
Premise: A man selling or delivering newspapers stands in front of a Spanish-language information sign.
Hypothesis: The mans newspapers are very cheap.
Update: The newspapers are made by a small local news team.

Ex Output:
strengthener


Ex Input:
Premise: An operator in a gold hard hat and orange vest sits hunched over on a large piece of John Deere equipment.
Hypothesis: A person is trying to figure out what is wrong with some equipment.
Update: The person has some tools out and is looking at the engine of the equipment.

Ex Output:

strengthener