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, that is, it makes you much less likely to believe the hypothesis is true. A strengthener is a statement that strengthens the hypothesis, that is, it makes you much more likely to believe the hypothesis is true. Your task is to answer with 'strengthener' or 'weakener' if the update strengthens or weakens the hypothesis, respectively.

Example Input: Premise: A woman serving a tennis ball.
Hypothesis: A woman is playing tennis with her husband.
Update: She has a basket of balls to practice with alone.
Example Output: weakener

Example Input: Premise: A woman is sitting on a chair outdoors with a microphone near her mouth and an instrument on her lap.
Hypothesis: A woman sings into a microphone.
Update: She begins to hum and play her instrument.
Example Output: strengthener

Example Input: Premise: A group of guys are standing on a stage playing several different instruments.
Hypothesis: A group of guys are performing a rock song.
Update: The men are wearing classic suits and ties
Example Output:
weakener