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 blond little boy is standing by a fence.
Hypothesis: The boy is waiting for his friends to come over.
Update: he is waving to boys walking towards him.

Ex Output:
strengthener


Ex Input:
Premise: A black and white dog is playing with a large brown cow.
Hypothesis: A dog is let loose on a farm and goes up to a cow wanting to play.
Update: The dog is excited and starts to pet the cow

Ex Output:
strengthener


Ex Input:
Premise: The man has a blue shirt on and is standing in front of some snowy mountains.
Hypothesis: The man is currently in Alaska.
Update: He is visiting his daughter in Nome.

Ex Output:

strengthener