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 is doing a stunt with his skateboard.
Hypothesis: A boy is doing tricks at a skate park.
Update: The boy is in his driveway.
Example Output: weakener

Example Input: Premise: Man in plaid shirt scaling rocks.
Hypothesis: A man is mountain climbing.
Update: The man has a small ice axe with him
Example Output: strengthener

Example Input: Premise: A small male child in a GAP shirt sitting on a blue tractor.
Hypothesis: A child dressed in clothing made by slave labor sitting on a vehicle used for agriculture.
Update: The child's shirt was manufactured in New York.
Example Output:
weakener