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 young boy hanging on a pole smiling at the camera.
Hypothesis: The young boy is hispanic.
Update: The young boy has blond hair and blue eyes and speaks with a Swedish accent.
Example Output: weakener

Example Input: Premise: A young man is presenting another woman with a cake with three candles on top.
Hypothesis: The cake has white frosting.
Update: The dark chocolate cake was the woman's favorite flavor.
Example Output: weakener

Example Input: Premise: Two basketball players contend for a rebound.
Hypothesis: fouling each other going for rebound
Update: The referee blows his whistle.
Example Output:
strengthener