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: A group of chefs are cooking at a barbecue restaurant.
Hypothesis: Chefs cooking steak at a barbecue restaurant.
Update: The main dish on the menu is filet mignon.

Ex Output:
strengthener


Ex Input:
Premise: The black dog is by a soccer ball and the brown dog is running.
Hypothesis: Two dogs are playing together on a soccer field.
Update: The dogs are playing in their backyard.

Ex Output:
weakener


Ex Input:
Premise: Old man in third world country squats while working with a large hammer.
Hypothesis: Old man is building a fence
Update: The man hopes the slats look straight.

Ex Output:

strengthener