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 group of men wearing cowboy hats are sitting next to a horse.
Hypothesis: A group of men are watching something.
Update: The herd is agitated about something and they try to figure out what it is.
Example Output: strengthener

Example Input: Premise: A band playing on stage, with one man on keyboards and the other playing a red guitar.
Hypothesis: A band is playing to a sold out crowd.
Update: The people are screaming encore.
Example Output: strengthener

Example Input: Premise: Little boy sitting on the sidewalk outside.
Hypothesis: The boy is waiting on his friend.
Update: The little boy is having trouble tying his unlaced shoe.
Example Output:
weakener