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 girls wearing a yellow shirt, one wearing a green shirt, and the last wearing a pink are each looking to the side
Hypothesis: Girls are looking at a sign on the wall.
Update: They all have a crush on the boy walking by.
weakener

Premise: Three street musicians wearing brown coats play the drums and trumpet in front of a store.
Hypothesis: three street musicians are playing jazz in front of a store.
Update: the musicians cover a country song
weakener

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: A sign reads 11th grade in the corner of the room.

strengthener