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 gets on with PersonX's life
Hypothesis: Because PersonX wanted to move ahead in life
Update: PersonX could not get over the breakup with PersonX's girlfriend.

SOLUTION: weakener

PROBLEM: Premise: PersonX gives PersonY a special gift
Hypothesis: PersonX is seen as delighted
Update: PersonX smiles happily while talking with personY

SOLUTION: strengthener

PROBLEM: Premise: PersonX declares war on PersonY
Hypothesis: Because PersonX wanted to get revenge
Update: Y had killed X's son.

SOLUTION:
strengthener