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: A police officer is monitoring a by stander while guarding a building.
Hypothesis: The police officer is a man.
Update: The officer looks stern.

Output: strengthener


Input: Consider Input: Premise: Young lady diving into a swimming pool wearing only a bikini with half of her body submerged.
Hypothesis: a lady diving into a swimming pool on a hot summer day
Update: There is a bottle of sunscreen on the edge of the pool

Output: strengthener


Input: Consider Input: Premise: A man in a welders helmet sitting on a metal beam.
Hypothesis: A worker is taking a short break.
Update: The man has a welding mask covering his face.


Output: weakener