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 in red swim shorts playing with sand on a beach.
Hypothesis: A boy is building a sandcastle.
Update: He uses a shovel to dig a moat.
strengthener

Premise: Hippies blow bubbles at a festival.
Hypothesis: The people are enjoying themselves.
Update: People are pushing, shoving and tripping over each other.
weakener

Premise: A young girl with a big black coat jumping, surrounded by white snow and a mountain covered in pine trees.
Hypothesis: A toddler with an oversized coat plays in the snow.
Update: The girls mother holds her hand

strengthener