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: 2 girls washing a floor covered in soap.
Hypothesis: The floor has lots of bubbles.
Update: The floor is slick and shiny.
Example Output: weakener

Example Input: Premise: A man wearing all black plays a coffee-burst bass guitar with a band.
Hypothesis: A man is playing with his band in a garage.
Update: There are many onlookers seated in the audience.
Example Output: weakener

Example Input: Premise: A young woman and a young man sitting in the grass
Hypothesis: They are a couple
Update: They have been assigned to do a botany project together.
Example Output:
weakener