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 standing in a white shirt is conducting a small group of violin players.
Hypothesis: Bob is conducting a small group.
Update: The man's birth certificate says Robert.
Example Output: strengthener

Example Input: Premise: Three construction workers are standing outside and having a conversation.
Hypothesis: Construction workers are chatting during a break.
Update: The men have meals in their hands.
Example Output: strengthener

Example Input: Premise: A balding man wearing a brown jacket with his hands crossed and his head tilted down.
Hypothesis: A balding man wearing a brown bomber jacket with his hands crossed and his head tilted down.
Update: The man loves bomber style jackets.
Example Output:
strengthener