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.

Premise: A female student concentrates on her schoolwork.
Hypothesis: A student is at school working on her schoolwork.
Update: The library is very quiet and a good place for her to finish her assignment.
strengthener

Premise: Two hockey players trying to score in their opponents goal.
Hypothesis: two hockey players are looking for the puck
Update: The two hockey players pass the puck back and forth.
weakener

Premise: Many people who are wearing black, red, white and blue standing on a red brick sidewalk.
Hypothesis: Many people are waiting for a parade to start.
Update: The roads are blocked off.

strengthener