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 woman sitting next to her purse watching dogs at the park.
Hypothesis: woman is video taping dogs in the park
Update: The woman has a cellphone in her hands
Example Output: strengthener

Example Input: Premise: A cowboy riding on the back of a bronco in a competition.
Hypothesis: the cowboy was winning the competition
Update: The cowboy was in last place.
Example Output: weakener

Example Input: Premise: Two dogs jumping on each other.
Hypothesis: Two dogs leap at each other in a field
Update: They are in a large grassy area.
Example Output:
strengthener