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.
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Question: Premise: A boy in a black shirt punches a yellow punching bag while a boy in a blue sweatshirt holds the bag.
Hypothesis: Two boys take turns using a punching bag.
Update: They are both training.

Answer: strengthener


Question: Premise: A woman sitting next to her purse watching dogs at the park.
Hypothesis: woman is video taping dogs in the park
Update: The woman has a cellphone in her hands

Answer: strengthener


Question: Premise: The women gives the man a hug and kiss while his dog is on the leash.
Hypothesis: the lady kisses the guy on christmas
Update: There is a Christmas tree nearby.

Answer:
strengthener