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 woman stands in front of a fence and next to a bucket, chewing her nails.
Hypothesis: The nervous woman chews her nails in front of the fence next to the bucket.
Update: She is chewing her nails because she has no nail trimmer.
Example Output: weakener

Example Input: Premise: Runner 3618 is racing down the street.
Hypothesis: The runner is sweaty.
Update: The runner is dripping with sweat despite only being halfway through the race.
Example Output: strengthener

Example Input: Premise: A man climbs a ladder in front of a store.
Hypothesis: A sad man climbs a ladder in front of a store.
Update: The man is planning to jump off the store roof.
Example Output:
strengthener