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: Bikers stopped on a road.
Hypothesis: Biker men sitting on bikes conversing.
Update: The bikers are sitting on the road but not even looking at each other.
Example Output: weakener

Example Input: Premise: One guy skateboarding on a cement curb with his hands in the air.
Hypothesis: A guy is in a skating competition.
Update: The guy almost got hit by a passing car.
Example Output: weakener

Example Input: Premise: Toddler in blue shirt and beige khaki shorts and brown shoes, holding a small blue shovel, walking along beach shore with two white seagulls swooping towards him.
Hypothesis: The toddler is going to build a sandcastle.
Update: The boy has a sand castle mold in his hand
Example Output:
strengthener