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 attends to PersonY's duties
Hypothesis: As a result, PersonX feels focused
Update: Person X is working quickly.
Example Output: strengthener

Example Input: Premise: PersonX changes my life
Hypothesis: PersonX then gets thanked from me
Update: PersonX does not want any thanks.
Example Output: weakener

Example Input: Premise: PersonX throws the football
Hypothesis: PersonX is seen as guilty about it
Update: PersonX made a touchdown for the opposing team.
Example Output:
strengthener