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: Outside by the trees, a woman wearing jeans and red jacket throws something for a German shepherd to chase.
Hypothesis: A young lady is teaching her pet dog how to play fetch.
Update: The woman is the wife of a K-9 officer
Example Output: strengthener

Example Input: Premise: A black and brown dog is running out of the surf.
Hypothesis: A dog is swimming excitedly.
Update: The dog swims with great enthusiasm out of the water.
Example Output: strengthener

Example Input: Premise: A group of chefs are cooking at a barbecue restaurant.
Hypothesis: Chefs cooking steak at a barbecue restaurant.
Update: The only thing on the menu is ribs
Example Output:
weakener