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: A man in a hat and coat is holding a pitchfork and posing for a picture.
Hypothesis: The man is on a farm
Update: There are chickens and cows all around him.
Example Output: strengthener

Example 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.
Example Output: strengthener

Example Input: Premise: A young boy holds a welders mask in front of his face with one hand while welding with the other.
Hypothesis: A young man is welding twp pieces of metal together.
Update: He is working on one piece of metal.
Example Output:
weakener