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: An unidentified woman sleeping in a very unusual nook of a decorative stone structure.
Hypothesis: The woman is covered in a blanket.
Update: The woman purchased the blanket from one of the local shops.
Example Output: strengthener

Example Input: Premise: A blond boy in a blue t-shirt stands smiling before a craft of green nylon fabric.
Hypothesis: A boy is happy about his fabric choice.
Update: The boy's favorite color is green.
Example Output: strengthener

Example Input: Premise: One white car is speeding down a dirt road, throwing dirt up into the air behind it as it goes by.
Hypothesis: A cluster of horses watch as a dirt cloud forms behind a speeding white car on a dirt road.
Update: There is nothing alive after the nuclear blast.
Example Output:
weakener