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 skydiver in a yellow parachute prepares for landing.
Hypothesis: A skydiver is sweating from nerves.
Update: The skydiver's face and hair are wet.
Example Output: strengthener

Example Input: Premise: The three girls sat on the beach.
Hypothesis: The three girls sat on the beach gazing at the water.
Update: A clown is performing at the beach today.
Example Output: weakener

Example Input: Premise: Pilot of a plane reaching out the window and washing the windshield while the plane is on the ground.
Hypothesis: The pilot is wearing a hat.
Update: The Airforce uniform does not include a hat.
Example Output:
weakener