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 band playing on stage, with one man on keyboards and the other playing a red guitar.
Hypothesis: A band is playing to a sold out crowd.
Update: The people are screaming encore.
Example Output: strengthener

Example Input: Premise: Three people are listening to a lecture.
Hypothesis: Two women, and a man are seated while listening to a lecture.
Update: All three of the people have either a mustache, beard or both.
Example Output: weakener

Example Input: Premise: A girl in a red shirt holding a girl in a blue shirt who is holding onto the top of a cinder-block wall with one hand.
Hypothesis: The girl in blue is dangling off the edge of a building.
Update: the girl jumps off the block wall and lands safely
Example Output:
weakener