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: This is a painting of a group of people playing string instruments in a old building with many shiny glowing chandeliers.
Hypothesis: The painting shows the group of people in a very positive image.
Update: In the painting some of the people are frowning.

Ex Output:
weakener


Ex Input:
Premise: A city block is sealed off by the police.
Hypothesis: People can not access the city block.
Update: The block is completely empty and there are policemen guarding barriers around the block.

Ex Output:
strengthener


Ex Input:
Premise: Two people on a city street looking up into the night sky.
Hypothesis: Two people on a city street stare at the moon.
Update: There are many star constellations in the sky.

Ex Output:

weakener