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 bright wall painting on the street.
Hypothesis: A mural of a sunset.
Update: An onlooker remarks 'Lovely, reminds me of nights in Daytona'
Example Output: strengthener

Example Input: Premise: a lone skier skiing down a snowy mountain on one ski.
Hypothesis: The skier has one broken ski.
Update: The ski was too big for his foot.
Example Output: weakener

Example Input: Premise: Crowded street with a man taking a photo with his phone.
Hypothesis: The man is taking a picture of a beautiful woman.
Update: The man's camera is aimed at the sun setting behind the Eiffel tower.
Example Output:
weakener