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 buys pizza
Hypothesis: PersonX is seen as full
Update: PersonX didn't plan on finishing the entire pizza himself.

Output: strengthener


Input: Consider Input: Premise: PersonX gives tom
Hypothesis: Before, PersonX needed to have something to give
Update: X passes along his knowledge.

Output: strengthener


Input: Consider Input: Premise: PersonX is invited to a halloween party
Hypothesis: As a result, PersonX feels friendly
Update: PersonX is new to town


Output: strengthener