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 male taking a nap on a hot afternoon.
Hypothesis: A big human taking a nap.
Update: The man is on a bed that is buckling due to his weight.
Example Output: strengthener

Example Input: Premise: An elderly man uses his walking stick to poke into a hole in the ground.
Hypothesis: A guy sticks his wooden stick in the ground.
Update: The stick is vulnerable to termites.
Example Output: strengthener

Example Input: Premise: An artist adds painted decorations to a van.
Hypothesis: The artist has been hired to paint.
Update: The van company had the artist on a tight deadline.
Example Output:
strengthener