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.

Input: Consider Input: Premise: PersonX surprises PersonX's parents
Hypothesis: Because PersonX wanted to meet his parents
Update: PersonX hasn't seen their parents in months.

Output: strengthener


Input: Consider Input: Premise: PersonX gets tired
Hypothesis: PersonX is seen as sluggish
Update: PersonX moves very slowly.

Output: strengthener


Input: Consider Input: Premise: PersonX gets a flu shot
Hypothesis: Before, PersonX needed determine the necessity of the shot
Update: PersonX is scared of vaccines.


Output: strengthener