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 boy jumping over another boy on a trampoline.
Hypothesis: The two boys are related.
Update: The boys are of different races.
Example Output: weakener

Example Input: Premise: A man in a yellow construction hat with a tool bag on his back, is drilling a wall labeled superior walls.
Hypothesis: A construction worker is building the walls to a house.
Update: The wall has windows in it.
Example Output: strengthener

Example Input: Premise: A small black and white dog.
Hypothesis: Two small dogs, each a different color
Update: The black and white pup has no colors in common with its mother.
Example Output:
strengthener