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.

Example Input: Premise: a young man jumping a back flip off of a concrete wall.
Hypothesis: The flip is high
Update: The wall is 10 feet tall
Example Output: strengthener

Example Input: Premise: Two children, one in red and one in blue, making snow angels.
Hypothesis: The children are making the angels for their parents.
Update: The children are at school.
Example Output: weakener

Example Input: Premise: A rock climber checks his rope before holding on to the next spot on the rock.
Hypothesis: The climber is on a mountain.
Update: The climber is indoors.
Example Output:
weakener