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 helps PersonY learn
Hypothesis: Before, PersonX needed have knowledge
Update: PersonX is a certified teacher.

Output: strengthener


Input: Consider Input: Premise: PersonX goes to PersonY's house
Hypothesis: PersonX is seen as accomplished
Update: Their friend is a bad person

Output: weakener


Input: Consider Input: Premise: PersonX thinks of a solution
Hypothesis: As a result, PersonX wants to implement the solution
Update: PersonX has been working on the problem all day.
Output: strengthener