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: Men and women outside holding hands to form circles.
Hypothesis: Some people are holding hands and singing.
Update: A banner behind them reads 'Meditation class'
Example Output: weakener

Example Input: Premise: A man with a tan hat and jacket is fishing in green waters.
Hypothesis: A man in outdoor gear catches food from a pond.
Update: The man tosses the fish back into the pond.
Example Output: weakener

Example Input: Premise: A lady in denim shorts and red sleeveless shirt is walking towards a building.
Hypothesis: A lady is walking towards an office building.
Update: It is a tall rectangular glass building.
Example Output:
strengthener