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.

[EX Q]: Premise: a person lying outside reading a book during the day.
Hypothesis: A student studies outside on a sunny day.
Update: The person is wearing sunblock.
[EX A]: strengthener

[EX Q]: 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.
[EX A]: strengthener

[EX Q]: Premise: An elderly woman wearing a green coat and brown pants is standing on a sidewalk.
Hypothesis: A sad woman wearing a green coat and brown pants is standing on a sidewalk.
Update: Her face is expressionless.
[EX A]:
weakener