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.
--------
Question: 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.

Answer: weakener


Question: Premise: two girls sit on a large rock.
Hypothesis: Two sisters pose for a picture on their favorite rock.
Update: The girls are having lunch on a picnic during a vacation in a country they've never seen.

Answer: weakener


Question: Premise: Two men in karate uniforms, one with red gloves and belt and the other with blue gloves and belt, box, while the man in blue is making a face as if her were screaming.
Hypothesis: The karate instructor is annoyed with his students.
Update: The instructor crosses his arms disapprovingly

Answer:
strengthener