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.

Ex Input:
Premise: A man wearing a black jacket and white shirt is talking to a woman at a bar.
Hypothesis: A man is talking to a woman he would like to date at a bar.
Update: The man is touching the woman’s arm

Ex Output:
strengthener


Ex 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.

Ex Output:
weakener


Ex Input:
Premise: A student sitting in a simple classroom appears deep in thought.
Hypothesis: A student learning about mathematics.
Update: The chalkboard is covered in mathematical formulas.

Ex Output:

strengthener