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 man on a bridge holds a blue object over the rail.
Hypothesis: A sad man on a bridge holds a blue object over the rail.
Update: The man is frowning and looks like he may cry.
strengthener

Premise: Children climbing an old tree in front of a brick building.
Hypothesis: Children are climbing an old tree in front of the school.
Update: The library in the area has been around for many years.
strengthener

Premise: Two men sitting on their living floor.
Hypothesis: Two men play video games in the living room.
Update: They are eating a pizza.

weakener