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: An enthusiastic young man runs with an exercise ball as he's being chased.
Hypothesis: A man and his friend is playing catch.
Update: The man throws the ball back to his friend.
strengthener

Premise: A woman and girl pose together in a garden.
Hypothesis: The woman is the girl's mother
Update: The woman says to the girl 'I know you'll be a great wife to my son'
weakener

Premise: Lady with sunglasses looks up, while man on her left consults a map
Hypothesis: The lost couple tried to find their way home with the map.
Update: The couple recently moved to the area.

strengthener