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: 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
Example Output: strengthener

Example Input: Premise: Firefighters climbing past a tree.
Hypothesis: Firefighters are climbing to put out a fire on a tall building
Update: The firefighters are going up an extended ladder.
Example Output: strengthener

Example Input: Premise: A man with a red helmet in the mountains
Hypothesis: man climbling hill
Update: The man is using a walker and has an 'Information' tag on his lapel.
Example Output:
weakener