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.

Input: Consider Input: Premise: a person lying outside reading a book during the day.
Hypothesis: A student studies outside on a sunny day.
Update: The person is wearing sunblock.

Output: strengthener


Input: Consider Input: Premise: Someone in an orange vest sits with a blue and yellow device in his hand.
Hypothesis: This man is a construction worker.
Update: The man is sitting on a runway of an airport

Output: weakener


Input: Consider Input: Premise: Two men and a dog are standing among rolling green hills.
Hypothesis: The men are farmers.
Update: The dogs are herding cattle


Output: strengthener