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: A boy doing a trick in the air on his bicycle
Hypothesis: A boy doing a trick is laughing.
Update: The boy is straight-faced.
Example Output: weakener

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: Ballerina in pinkish red leotard, tutu, and fan gracefully leaps through the air on stage while small children in the background look on.
Hypothesis: The ballerina is being admired by the children.
Update: The children look disappointed.
Example Output:
weakener