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 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: Two people standing in a curved interior, multi-level building.
Hypothesis: The people are standing in an elevator inside.
Update: People are standing inside curved multi-level building.
Example Output: weakener

Example Input: Premise: People sitting on the side of a lake.
Hypothesis: The group of people are dipping their toes in the water.
Update: The water is frozen.
Example Output:
weakener