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 is wearing a green shirt and a welders mask.
Hypothesis: A man is hiding his identity.
Update: He stops every few yards, lifts the face piece while looking all around then returns it and goes a few more yards.
strengthener

Premise: The woman is holding a camera and standing on a brick wall.
Hypothesis: The woman is on the wall finding the right angle for a photo.
Update: The camera is attached to a tripod.
weakener

Premise: Many people are walking around shopping in a brightly lit and colorful shopping mall.
Hypothesis: It's a busy Christmas season at the mall.
Update: Pumpkin decorations line the hallways

weakener