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.

Input: Consider Input: Premise: A group of young girls hold hands while wearing colorful skirts while other women dance and smile around them with two men discussing something in the background.
Hypothesis: The girls are friends.
Update: The girls introduce themselves to each other.

Output: weakener


Input: Consider Input: Premise: Three boys in t-shirt standing outside of a dilapidated building.
Hypothesis: They used to live in the building.
Update: A woman stands in a doorway motioning for the boys to come to dinner.

Output: weakener


Input: Consider Input: Premise: Two men; one in a blue shirt and ball cap, and the other in a white shirt playing frisbee on a field near an airport.
Hypothesis: Two men are having fun playing frisbee on a nice day.
Update: They are laughing and smiling.


Output: strengthener