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: Girl in striped dress holding woman's hand.
Hypothesis: A girl is holding her mother's hand.
Update: The girl and woman look alike.

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: A wooly dog on a beach looks toward another dog in the water.
Hypothesis: The dogs enjoy swimming.
Update: The dog on the beach is running towards the water

Ex Output:

strengthener