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: An older man using a microscope to have more finesse in woodworking.
Hypothesis: man teaches new technique
Update: Nobody is watching the man.
Example Output: weakener

Example Input: Premise: A diver swims past a school of colorful fish.
Hypothesis: The diver is a scientist studying fish.
Update: The diver has a camera and notes.
Example Output: strengthener

Example Input: Premise: An older man sits on a green park bench next to a tree.
Hypothesis: a man feeds ducks
Update: There are screaming kids running around the man.
Example Output:
weakener