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.

[Q]: Premise: A group of black boys in a classroom setting wearing white shirts, listening to a speech about UNICEF.
Hypothesis: A group of high school students hear about the advantages of donating to UNICEF.
Update: The boys' teacher used to work for UNICEF.
[A]: strengthener


[Q]: Premise: A young man wearing a red bandanna at an event.
Hypothesis: The event is outdoors.
Update: The bandanna kept the young man dry when the rain started in the middle of the concert.
[A]: strengthener


[Q]: Premise: Two people with children exchange words.
Hypothesis: The children are friends.
Update: The children look angry
[A]:
weakener