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: A woman wearing blue pants and a blue and pink shirt with a white cloth over her head is kneeling on front of several buckets and containers on the floor.
Hypothesis: A woman is cleaning the floor
Update: The buckets are filled with soapy water and the woman is holding a rag.
Example Output: strengthener

Example Input: Premise: A boy playing on an arrangement of stones.
Hypothesis: The stones were shining in the bright sunlight as the boy tiptoed across them in his barefeet.
Update: It was night time.
Example Output:
weakener