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 young boy wearing goggles, a vest, and arm floaties is swimming in a pool.
Hypothesis: A boy is learning to swim.
Update: The boy is accompanied by an instructor.
strengthener

Premise: A cubby cheeked baby in a yellow and red bib playing with a toy.
Hypothesis: The baby loves playing with toys.
Update: The baby only has one toy.
weakener

Premise: A crowd watches a bronco rider.
Hypothesis: There is a rodeo taking place.
Update: the rider is about to get on the bull.

strengthener