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 is swinging on a rope above the water.
Hypothesis: A man pretends to be Tarzan as he swings around.
Update: The man holds the rope with two hands.
Example Output: weakener

Example Input: Premise: An african american woman wearing an orange dress with a hood is covering her face with her hand while sitting in a chair.
Hypothesis: The woman in the orange dress is playing peek-a-boo with her brother's toddler.
Update: A child squeals and laughs at its aunt.
Example Output: strengthener

Example Input: Premise: A man uses a drill on his mountain bike spokes.
Hypothesis: The man is about to ride his bike again.
Update: He finished up and quickly reviewed the map for possible routes up the mountain.
Example Output:
strengthener