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 man in a white t-shirt paddles his canoe across the lake
Hypothesis: A man paddles a boat to his lover.
Update: A person stands on the banks across from the canoe.

Ex Output:
strengthener


Ex Input:
Premise: A man in a blue shirt is pushing another man in a white shirt during football practice.
Hypothesis: The offensive man is blocking the defense.
Update: The man in white weighs 300 pounds

Ex Output:
strengthener


Ex Input:
Premise: Three people in t-shirt, yellow helmets and harnesses begin to climb ladder.
Hypothesis: Three people climb a ladder to rescue soemone.
Update: The fire started at an old, abandoned factory.

Ex Output:

weakener