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 racks PersonX's brain
Hypothesis: As a result, PersonX feels lethargic
Update: PersonX exerts a lot of mental energy.

Output: weakener


Input: Consider Input: Premise: PersonX enters the classroom
Hypothesis: As a result, PersonX feels curious
Update: PersonX is attending his first college class.

Output: strengthener


Input: Consider Input: Premise: PersonX smells very bad
Hypothesis: PersonX then nose wrinkles involuntarily
Update: The wind suddenly blew back in PersonX's director.


Output: strengthener