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 in a tan jacket with a rather intense stare.
Hypothesis: A man is staring at someone he wants to fight
Update: the man goes over to the other man and shoves him
Example Output: strengthener

Example Input: Premise: Man on bike in mountains
Hypothesis: A tall human on bike
Update: The man has to crouch down to steer through the mountains.
Example Output: strengthener

Example Input: Premise: Two people working on a sculpture in an art studio.
Hypothesis: The people are using clay for their sculpture.
Update: They have clay on their hands.
Example Output:
strengthener