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: Girl wearing a hat and holding her bike talks to her friend.
Hypothesis: Girl holding her bike is talking to her friend with black hair.
Update: The girl's hair is dark.

Output: strengthener


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: An elderly man wearing a hat and blue jacket is folding his hands.
Hypothesis: The man is saying a prayer before dinner.
Update: Others sitting at the table have their eyes closed with plates in front of them.


Output: strengthener