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 drinks coffee
Hypothesis: Because PersonX wanted to be alert
Update: X has migraine headaches.

SOLUTION: weakener

PROBLEM: Premise: PersonX lets PersonY explain
Hypothesis: PersonX is seen as satisfied.
Update: PersonY had a good explanation

SOLUTION: strengthener

PROBLEM: Premise: PersonX hits a pole
Hypothesis: As a result, PersonX feels angry
Update: PersonX ruined his car.

SOLUTION:
strengthener