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.

Input: Consider Input: Premise: Little boy in black jacket, kicking leaves.
Hypothesis: A child is happily playing in the leaves.
Update: His face is sullen.

Output: weakener


Input: Consider Input: Premise: Several people standing in the street.
Hypothesis: people were waiting for the light to change so they could cross
Update: The police officer was holding them up with his hand.

Output: strengthener


Input: Consider Input: Premise: A man in a blue tee-shirt, wearing a cap, is riding a white horse down a dirt road, in a rural setting of grass and hills.
Hypothesis: The man is on his way to find a lost foal in his father's field
Update: The man has to hurry to the field because of an emergency.


Output: strengthener