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 sawing wood on a fence.
Hypothesis: It's sunny outside while a man is cutting wood.
Update: The man is wearing a visor and sunglasses.
Example Output: strengthener

Example Input: Premise: People walking along a pathway along a lake.
Hypothesis: People may going swimming in the lake.
Update: The people are wearing swimsuits.
Example Output: strengthener

Example Input: Premise: A girl is jumping a hurdle and about to touch ground.
Hypothesis: A girl is about to catch her foot on a hurdle and fall to the ground in a heap.
Update: The girl slightly underestimated how high the hurdle is.
Example Output:
strengthener