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 girl in an aqua tank top is watching a man in a blue tank top and shorts wash the window.
Hypothesis: The girl has a crush on the man washing windows.
Update: The girl has watched him for half an hour
Example Output: strengthener

Example Input: Premise: Children climbing an old tree in front of a brick building.
Hypothesis: Children are climbing an old tree in front of the school.
Update: The library in the area has been around for many years.
Example Output: strengthener

Example Input: Premise: A singer singing in front of the stage with a funny custom on
Hypothesis: The singer is getting ready to go on stage
Update: A group of people in the audience stands and claps
Example Output:
weakener