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: Tree boys are skating while one takes pictures and a girl looks on.
Hypothesis: The boys are in a race.
Update: The boys are competing for the affection of the girl.
strengthener

Premise: Two parents sit on a couch while a girl in a pink sweater lounges across them.
Hypothesis: The two parents are married.
Update: The parents' children have different last names.
weakener

Premise: This worker is high above the buildings changing the advertising on a bulletin board.
Hypothesis: this worker's job is dangerous
Update: He wears a harness on a thin ledge.

strengthener