TASK DEFINITION: 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.
PROBLEM: Premise: A young man in a blue shirt with white shorts volleys a tennis ball.
Hypothesis: A sad man in a blue shirt with white shorts volleys a tennis ball.
Update: He is losing the match.

SOLUTION: strengthener

PROBLEM: Premise: A young woman and a young man sitting in the grass
Hypothesis: They are a couple
Update: The woman and the man maintain a distance between them and never touch.

SOLUTION: weakener

PROBLEM: Premise: A young woman wearing a white dress with a blue towel in her lap is having her hair dried by another woman used a hair dryer.
Hypothesis: A women is getting her hair cut
Update: There is no hair lying on the ground around the woman

SOLUTION:
weakener