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: Two children, one in red and one in blue, making snow angels.
Hypothesis: The children are making the angels for their parents.
Update: The children are at school.
weakener

Premise: A flying machine with a yellow sail is landing with industrial buildings in the background.
Hypothesis: The machine is not gas-operated.
Update: The machine has a battery.
strengthener

Premise: A man in a purple shirt walks down an alley with a cart full of a product.
Hypothesis: A man with a colorful shirt walks down a dark alley scared.
Update: The man walks down the alley with his eyes wide as he looks around him and behind him.

strengthener