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.

Ex Input:
Premise: Young lady diving into a swimming pool wearing only a bikini with half of her body submerged.
Hypothesis: a lady diving into a swimming pool on a hot summer day
Update: There is a bottle of sunscreen on the edge of the pool

Ex Output:
strengthener


Ex Input:
Premise: A diver swims past a school of colorful fish.
Hypothesis: The diver is a scientist studying fish.
Update: The diver has a camera and notes.

Ex Output:
strengthener


Ex Input:
Premise: A man cleaning the floor in an empty room
Hypothesis: a man is cleaning the already clean floor
Update: The floor is very shiny.

Ex Output:

strengthener