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 woman is sitting on a man's lap in a chair.
Hypothesis: The man is in love with the woman sitting on his lap.
Update: The woman is the man's wife.
Example Output: strengthener

Example Input: Premise: Men and women outside holding hands to form circles.
Hypothesis: Some people are holding hands and singing.
Update: A banner behind them reads 'Meditation class'
Example Output: weakener

Example Input: Premise: a great Dane climbing a steep hill
Hypothesis: The great dane is chasing a cat up the hill.
Update: The dog is walking slowly.
Example Output:
weakener