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 in a yellow construction hat with a tool bag on his back, is drilling a wall labeled superior walls.
Hypothesis: A construction worker is building the walls to a house.
Update: The wall has windows in it.
strengthener

Premise: A boy wearing blue shorts is doing a back flip in the air under a tree.
Hypothesis: A boy is doing back flips outdoors
Update: The tree is in the local park
strengthener

Premise: A white guy wearing a wetsuit is water-skiing.
Hypothesis: A man is wearing a red wet suit as he skis on the water.
Update: The man's jet black wetsuit was in sharp contrast to his skin.

weakener