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.

Example Input: Premise: PersonX loves PersonY back
Hypothesis: Because PersonX wanted a good marriage
Update: PersonX is seen kissing PersonY's cheek.
Example Output: strengthener

Example Input: Premise: PersonX makes up PersonY's mind
Hypothesis: As a result, PersonX wants to get his point proved
Update: PersonX is part of a political campaign going door to door.
Example Output: strengthener

Example Input: Premise: PersonX invites all PersonY's friends and family
Hypothesis: Before, he gets some food ready.
Update: They're having a Thanksgiving celebration
Example Output:
strengthener