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: Several people are dividing up painting supplies.
Hypothesis: men and women dividing supplies
Update: Some of the people have breasts, and some have beards.
Example Output: strengthener

Example Input: Premise: A man wearing a black shirt.
Hypothesis: A man is ready for a wedding
Update: The shirt is sleeveless.
Example Output: weakener

Example Input: Premise: Two children peer over a rusty ledge.
Hypothesis: Two brothers look over a ledge.
Update: The children have been circumcised.
Example Output:
strengthener