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 cheerleading squad poses for a picture in front of full bleachers
Hypothesis: The cheerleader squad take a picture for a yearbook.
Update: The picture is being taken by the Yearbook editor.
Example Output: strengthener

Example Input: Premise: Two guys hold up a flag at a festival.
Hypothesis: Two guys that are brothers are at a festival.
Update: One of the guys is black and one of the guys is white.
Example Output: weakener

Example Input: Premise: Two men, wearing warm clothing, are jumping beside a fence.
Hypothesis: The men are jumping for joy.
Update: The fence is locked.
Example Output:
weakener