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: Lecture takes place in casual atmosphere.
Hypothesis: The lecture is lengthy.
Update: Most people had packed a lunch.
strengthener

Premise: A young man wearing a red bandanna at an event.
Hypothesis: The event is outdoors.
Update: The bandanna kept the young man dry when the rain started in the middle of the concert.
strengthener

Premise: Two people are holding a trash bag getting ready to pick up debris while a third person is looking at a camera bag.
Hypothesis: Two people are on litter patrol, and the third person is distracted
Update: The two do not know the third person.

strengthener