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: Three boys on a basketball court, wearing team uniforms, are attempting to reach a basketball which is not photographed but appears to be descending just out of their reach.
Hypothesis: there is a tie game
Update: The teams can't score on each other.
Example Output: strengthener

Example Input: Premise: A man in a white t-shirt paddles his canoe across the lake
Hypothesis: A man paddles a boat to his lover.
Update: A person stands on the banks across from the canoe.
Example Output: strengthener

Example Input: Premise: A man grinds a piece of metal in front of an onlooker on a studio set.
Hypothesis: A sad man grinds a piece of metal in front of an onlooker on a studio set.
Update: The man loves metal-grinding.
Example Output:
weakener