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 tells PersonY's family
Hypothesis: PersonX then uses gestures
Update: Person X is deaf.
Example Output: strengthener

Example Input: Premise: PersonX scratches PersonX's head
Hypothesis: As a result, PersonX feels confused
Update: PersonX had an itchy head.
Example Output: weakener

Example Input: Premise: PersonX gets dressed for school
Hypothesis: As a result, PersonX wants to walk out of the house
Update: PersonX walks to school each day.
Example Output:
strengthener