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 very happy baby in a yellow shirt swinging on swing.
Hypothesis: The child is being pushed on the swing by their mother.
Update: A babysitter is pushing the baby

Ex Output:
weakener


Ex Input:
Premise: Two men playing ultimate Frisbee.
Hypothesis: Two guys are playing with a yellow Frisbee.
Update: The frisbee matches some tulips under a tree.

Ex Output:
strengthener


Ex Input:
Premise: The sky appears clear.
Hypothesis: The sky looked very clear at night.
Update: Many stars are visible.

Ex Output:

strengthener