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.

Premise: A person is writing on a chalkboard in a empty classroom.
Hypothesis: A man is doing math on a chalkboard.
Update: the person is a talented drawer.
weakener

Premise: Military men dressed in camouflage and white aim there weapons while out in the snowy weather.
Hypothesis: men have weapons
Update: They are looking in one direction and reaching for something at their sides.
strengthener

Premise: A man keeps order on a crowded street of people.
Hypothesis: A man is directing traffic.
Update: The man has a whistle and uniform and motions for cars to stop and go.

strengthener