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.

Input: Consider Input: Premise: A man pushing a cart near the subway.
Hypothesis: The man is selling hotdogs.
Update: Steam comes of of the cart.

Output: strengthener


Input: Consider Input: Premise: Four people are wearing life jackets on a motorboat on still waters.
Hypothesis: The four people are about to compete in a fishing competition.
Update: None of the people have fishing rods.

Output: weakener


Input: Consider Input: Premise: A man swings a golf club while the person to his left waves an arm.
Hypothesis: A person swings a golf club during lessons.
Update: The other man is his instructer.


Output: strengthener