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 bright wall painting on the street.
Hypothesis: A mural of a sunset.
Update: The colors are beautiful in red and gold.
Example Output: strengthener

Example Input: Premise: A group of volunteers help build a house on behalf of Habitat for Humanity.
Hypothesis: Tall beings building
Update: The group of volunteers are average height.
Example Output: weakener

Example Input: Premise: Two men dressed jackets and hats are standing on a terrace
Hypothesis: 2 men in suits are outside
Update: The two men have puffy jackets on.
Example Output:
weakener