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 boy in red swim shorts playing with sand on a beach.
Hypothesis: A boy is building a sandcastle.
Update: He uses a shovel to dig a moat.
Example Output: strengthener

Example Input: Premise: A happy soccer clad in a white uniform player takes the ball ahead of the other team, who are dressed in red.
Hypothesis: player about to score
Update: The players are next to the goals.
Example Output: strengthener

Example Input: Premise: A man is swinging on a rope above the water.
Hypothesis: A man pretends to be Tarzan as he swings around.
Update: The man holds the rope with two hands.
Example Output:
weakener