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: People walking along a pathway along a lake.
Hypothesis: People may going swimming in the lake.
Update: The people are wearing swimsuits.
strengthener

Premise: Several brown dogs playing with a tennis ball in a grassy field.
Hypothesis: dogs playing with a ball they just found
Update: The dog's owner has a photo at home of the dog with the ball.
weakener

Premise: A man running on a treadmill while listening to music.
Hypothesis: A man running on a treadmill while listening to Michael Jackson through his headphones.
Update: The man was a child of the 1980s.

strengthener