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.

Example Input: Premise: PersonX accomplishes PersonX's task
Hypothesis: Before, PersonX needed to work consistently
Update: X enjoyed regular hours.
Example Output: strengthener

Example Input: Premise: PersonX sells the car
Hypothesis: PersonX is seen as happy
Update: The car is an heirloom
Example Output: weakener

Example Input: Premise: PersonX tries to lose weight
Hypothesis: Because PersonX wanted to be thinner
Update: PersonX was told by their doctor that they will die soon if they don't change their eating habits.
Example Output:
weakener