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.

Input: Consider Input: Premise: A young boy wearing goggles, a vest, and arm floaties is swimming in a pool.
Hypothesis: A boy is learning to swim.
Update: The boy is accompanied by an instructor.

Output: strengthener


Input: Consider Input: Premise: A hiker walks on rocky ground at the base of a foggy mountain.
Hypothesis: The hiker is looking for a ledge to climb.
Update: He just came from the top of the mountain.

Output: weakener


Input: Consider Input: Premise: A man in a black jacket with a mohawk walks on a road.
Hypothesis: the man with the mohawk can't wait to get home.
Update: The man walks toward the door of a bank.


Output: weakener