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 and woman walking with their arms around each other.
Hypothesis: A couple is strolling together.
Update: The couple are madly in love.
Example Output: strengthener

Example Input: Premise: a woman wearing a neon jacket standing next to a large machine.
Hypothesis: The woman knows how to work the machine.
Update: The woman is considering adjustments to make the machine run more smoothly.
Example Output: strengthener

Example Input: Premise: A woman and child are walking.
Hypothesis: The woman and the child are at the park.
Update: The child has the flu or cold.
Example Output:
weakener