TASK DEFINITION: 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.
PROBLEM: Premise: Two football teams lined up before the hike.
Hypothesis: Two football teams line up during the superbowl for the hike.
Update: Ad time at the event is absurdly expensive.

SOLUTION: strengthener

PROBLEM: Premise: A bunch of people standing on sand.
Hypothesis: people are standing on a beach.
Update: Everyone is standing barefoot on hot sand.

SOLUTION: strengthener

PROBLEM: Premise: A cat sitting next to a person who has black pants and pink flip-flops on.
Hypothesis: A cat waits patiently for its owner to feed him.
Update: The cat hears a can opener.

SOLUTION:
strengthener