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 mama bear and its cub are growling directly at one another.
Hypothesis: A mama bear confronts her cub over food.
Update: There is a piece of meat between the bear and the cub.

Ex Output:
strengthener


Ex Input:
Premise: Bikers stopped on a road.
Hypothesis: Biker men sitting on bikes conversing.
Update: The bikers are sitting on the road but not even looking at each other.

Ex Output:
weakener


Ex Input:
Premise: The man is standing upside down on the bottle, with hands on the ground.
Hypothesis: The man is practicing yoga.
Update: The man has a straw in the bottle with his mouth on it

Ex Output:

weakener