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.
--------
Question: Premise: A man in costume drums in a parade.
Hypothesis: There is a man playing drums on a float.
Update: The man is marching with the rest of his band.

Answer: weakener


Question: Premise: A group of volunteers help build a house on behalf of Habitat for Humanity.
Hypothesis: Tall beings building
Update: The group of volunteers are average height.

Answer: weakener


Question: Premise: Stairs crowded with several people
Hypothesis: The people are inside the building
Update: There are echoes in the stairwell

Answer:
strengthener