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: Two people in front of a crowd who are wearing Native American robes and accessories.
Hypothesis: Two karate masters prepare for a fight.
Update: Someone interviewing the two men asks 'So how do you feel about the proposed pipeline?'
Example Output: weakener

Example Input: Premise: Two girls are standing behind another girl.
Hypothesis: Two girls are preparing to push a third girl.
Update: the third girl is on the top stair
Example Output: weakener

Example Input: Premise: There is a black dog jumping across sand.
Hypothesis: dog chasing his owner
Update: The dog sees a cat on the beach.
Example Output:
weakener