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.

Ex Input:
Premise: A brown dog chases a blond one in the grass.
Hypothesis: A person watches a one dog chase another.
Update: The blonde dog ran toward the pet door leading into the kitchen.

Ex Output:
weakener


Ex Input:
Premise: A crowd of people are holding signs and protesting against school cuts.
Hypothesis: A crowd of people chanting.
Update: A crowd of students and teachers chanting, "No layoffs."

Ex Output:
strengthener


Ex Input:
Premise: A large earth moving machine creating a track with a man watching it closely with what looks like surveying equipment.
Hypothesis: A large earth moving machine digging up the ground.
Update: There are piles of dirt beside the work area.

Ex Output:

strengthener