TASK DEFINITION: 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.
PROBLEM: Premise: PersonX takes PersonX's glasses
Hypothesis: As a result, PersonX feels content
Update: PersonX can see better with the glasses.

SOLUTION: strengthener

PROBLEM: Premise: PersonX enjoys the meal
Hypothesis: Before, PersonX needed to buy some food
Update: PersonX thanks their sibling for preparing the birthday meal.

SOLUTION: weakener

PROBLEM: Premise: PersonX heads for the hills
Hypothesis: As a result, PersonX feels free-spirited
Update: PersonX sings during the trip.

SOLUTION:
strengthener