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: Three adults take shots by a bar.
Hypothesis: There are three adult friends.
Update: The people are sitting seperately.
Example Output: weakener

Example Input: Premise: A man pushing a cart near the subway.
Hypothesis: The man is selling hotdogs.
Update: Steam comes of of the cart.
Example Output: strengthener

Example Input: Premise: A child with a Mohawk is wearing dark sunglasses.
Hypothesis: A child on a bright, sunny day.
Update: The sun can be seen overhead.
Example Output:
strengthener