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.

Ex Input:
Premise: A young woman and a young man sitting in the grass
Hypothesis: They are a couple
Update: The woman and the man maintain a distance between them and never touch.

Ex Output:
weakener


Ex Input:
Premise: a man in a beige shirt is operating a video camera next to a girl in a black sweater.
Hypothesis: The video camera is pointed at the girl.
Update: Two trapeze artists are putting on a show.

Ex Output:
weakener


Ex Input:
Premise: A man alone crosscountry skis in the wilderness while wearing a huge backpack.
Hypothesis: A man skis in the wilderness while it's snowing
Update: The fresh powder makes the skiing smooth.

Ex Output:

strengthener