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 slips and fell
Hypothesis: PersonX then has a bruise
Update: PersonX fell on concrete
strengthener

Premise: PersonX finally gave in
Hypothesis: As a result, PersonX feels tired
Update: The deliberation took many hours.
strengthener

Premise: PersonX turns PersonY's face
Hypothesis: Before, PersonX needed to go to PersonY
Update: PersonX is squeezing PersonY's cheeks.

strengthener