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 young boy wearing goggles, a vest, and arm floaties is swimming in a pool.
Hypothesis: A boy is learning to swim.
Update: The boy is accompanied by an instructor.

Output: strengthener


Input: Consider Input: Premise: Two men wrestle one in black wrestling gear the other in red, white, blue and gray while the referee leans in close.
Hypothesis: The two rivals are wrestling for the crowd.
Update: The crowd is cheering and booing.

Output: strengthener


Input: Consider Input: Premise: A man riding a bike has a bushel of brush on the back.
Hypothesis: the man was riding home
Update: The man is a forestry worker.


Output: weakener