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 young boy in a black jacket is running towards a woman with outstretched arms.
Hypothesis: A young boy runs to his mother for a hug.
Update: The boy calls the woman 'Mommy'

Ex Output:
strengthener


Ex Input:
Premise: A street vendor in Asia tries to bring in more customers.
Hypothesis: A salesman selling items to patrons.
Update: The salesman is lowering his prices.

Ex Output:
strengthener


Ex Input:
Premise: A group of people walking in front of a subway rail.
Hypothesis: A group of people waiting for a subway car to arrive.
Update: The people are looking down the track in the direction the train will be coming from.

Ex Output:

strengthener