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: Salvation Army members in uniform, one with a musical instrument, stand outside a store in a small group.
Hypothesis: The instrument is a trumpet
Update: One of the members holds a round instrument and sticks.
weakener

Premise: Young girl in pink T-shirt and black leggings tosses blue football in grassy open area.
Hypothesis: The girl is playing with the ball at the park.
Update: In the distance are kids on swings and people walking their dogs.
strengthener

Premise: A black dog with a red collar wading through the water.
Hypothesis: A black dog is trying to find his toy.
Update: The dog's owner has thrown a ball into the lake.

strengthener