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. It makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis. It makes you much more likely to believe the hypothesis is true. Your task is to output 'strengthener' or 'weakener' if the update strengths or weakens the hypothesis, respectively.

Premise: PersonX causes the smell
Hypothesis: PersonX then begins to smell
Update: PersonX throws a rotten egg off the side of a building.
weakener

Premise: PersonX looks back at PersonY
Hypothesis: As a result, PersonX feels curious
Update: PersonY gives PersonX a wave.
weakener

Premise: PersonX has one eye
Hypothesis: PersonX then has limited vision
Update: PersonX squints to see better

strengthener