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: Soccer player in blue is wiping his mouth with his shirt.
Hypothesis: There is a player taking a break.
Update: He wipes his face as he runs.
Example Output: weakener

Example Input: Premise: Man on bike in mountains
Hypothesis: A tall human on bike
Update: The man has to crouch down to steer through the mountains.
Example Output: strengthener

Example Input: Premise: Two adults and two children are riding bicycles down a street.
Hypothesis: a family is going on a bike ride
Update: The children are squabbling, but the adults don't intervene.
Example Output:
weakener