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.

Example Input: Premise: Two women and a man in a studio looking at a large portrait of Cher.
Hypothesis: Two women and a man are thinking about purchasing the large portrait of Cher.
Update: They are being shown around a friend's home.
Example Output: weakener

Example Input: Premise: An all-female band plays drums and guitar on a stage, in front of a banner reading "Screaming Orphans."
Hypothesis: The band name is "Screaming Orphans"
Update: The band is playing for free for charity.
Example Output: weakener

Example Input: Premise: A dog is backlit buy the sun as he jumps up to catch a tennis ball.
Hypothesis: A boy tosses a ball to his dog.
Update: The person tossing the ball has very short hair.
Example Output:
strengthener