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 hits PersonY hard
Hypothesis: PersonX then sore hand
Update: The review of his book was scathing.
Example Output: weakener

Example Input: Premise: PersonX gets a picture
Hypothesis: Because PersonX wanted a picture
Update: X's daughter painted it for him for Father's Day.
Example Output: weakener

Example Input: Premise: PersonX is starting high school
Hypothesis: Before, PersonX needed to be of age
Update: PersonX attends a public high school.
Example Output:
strengthener