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 woman with red-hair and a black hat is standing in front of pictures.
Hypothesis: The woman wearing the black hat has red hair.
Update: The woman dyes her hair.
weakener

Premise: A group of young girls hold hands while wearing colorful skirts while other women dance and smile around them with two men discussing something in the background.
Hypothesis: The girls are friends.
Update: The girls introduce themselves to each other.
weakener

Premise: A boy is holding onto and running along with a merry-go-round.
Hypothesis: A boy is about to trip and get hurt while playing on the merry-go-round.
Update: The boy's mother helps him to get up.

strengthener