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 man wearing black sits outside under palm trees near green and blue chairs.
Hypothesis: It is sunny outside.
Update: He is glistening with tanning oil
Example Output: strengthener

Example Input: Premise: Four adults and one child visit on a backyard patio.
Hypothesis: people are sitting and talking on their vacation
Update: The people look around like they haven't seen it before.
Example Output: strengthener

Example Input: Premise: A young man with a happy expression is tossing bits of colored paper into the air.
Hypothesis: A fat man with a happy expression is tossing bits of colored paper into the air.
Update: The large man was tossing confetti onto the wedding couple.
Example Output:
strengthener