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 female is getting her hair curled with a hair iron.
Hypothesis: The woman is getting her blonde hair curled.
Update: The woman's friends call her "Blondie".
Example Output: strengthener

Example Input: Premise: A crowd of people are holding signs and protesting against school cuts.
Hypothesis: A crowd of people chanting.
Update: A crowd of students and teachers chanting, "No layoffs."
Example Output: strengthener

Example Input: Premise: A man and a girl are sitting down and have a drink.
Hypothesis: A father and child are having a drink.
Update: A male parent and person under eighteen-years old are having a drink.
Example Output:
strengthener