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: Young women practicing marshal arts in a gym.
Hypothesis: A group of women doing Tai Chi at the gym.
Update: The women are part of a class.
Example Output: strengthener

Example Input: Premise: Several men helping each other pull in a fishing net.
Hypothesis: The men are fishing.
Update: There is an old tire in the net.
Example Output: weakener

Example Input: Premise: A man wearing a blue shirt and red hat riding on the back of a cart filled with hay and pulled by a white horse.
Hypothesis: A person heading to market with fresh produce to sell.
Update: A man is going on a hayride with friends.
Example Output:
weakener