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 young girl gliding on a rope swing beside a red barn.
Hypothesis: The girl is swinging alone.
Update: The girl is calling out someone's name
Example Output: weakener

Example Input: Premise: A blond little boy is standing by a fence.
Hypothesis: The boy is waiting for his friends to come over.
Update: he is waving to boys walking towards him.
Example Output: strengthener

Example Input: Premise: Three men ride horses by a fence.
Hypothesis: The fence is made of wood.
Update: A shiny reflection bounces off the fence.
Example Output:
weakener