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: People gathered outside a building in the dark.
Hypothesis: people are gathered outside a building because it's a night time fire drill.
Update: An ear-splitting alarm is going off.
strengthener

Premise: A young girl does a handstand on a bed with blue sheets.
Hypothesis: A girl is practicing gymnastics on her bed.
Update: The girl has a headstand video up on YouTube that she is copying
strengthener

Premise: a woman wearing a neon jacket standing next to a large machine.
Hypothesis: The woman knows how to work the machine.
Update: The woman is considering adjustments to make the machine run more smoothly.

strengthener