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.

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.
strengthener

Premise: A boy who is next to a river smiles tentatively at the camera.
Hypothesis: a boy is smiling at the camera before he jumps in the river
Update: The boy is wearing a winter jacket.
weakener

Premise: Group of Asian boys wait for meat to cook over barbecue.
Hypothesis: Group of Asian boys wait for spare ribs to finish cooking.
Update: The boys work as chicken farmers.

strengthener