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: Couple strolling hand in hand past shop in city.
Hypothesis: A man and woman are walking on a sidewalk in a shopping mall.
Update: It's cold outside but they are not wearing jackets.
strengthener

Premise: A man and woman walking with their arms around each other.
Hypothesis: A couple is strolling together.
Update: The couple are madly in love.
strengthener

Premise: Three girls are riding on a roller coaster.
Hypothesis: three girls scream on a roller coaster
Update: the girls have ridden the rollercoaster many times.

weakener