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.

Q: Premise: A cat is watching a girl construct a Lego airplane.
Hypothesis: A cat is watching a girl build a airplane and throw it across the room
Update: The plane is only half finished

A: weakener
****
Q: 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.

A: strengthener
****
Q: Premise: A Rotweiler with a tennis ball in its mouth and a black lab running in the snow.
Hypothesis: The dogs are playing with each other.
Update: The dogs grew up together.

A:
strengthener
****