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: Two girls in red and blowing bubbles with gum.
Hypothesis: One child has challenged another to blow the biggest bubble.
Update: The girls are carefully controlling their breathing to make the bubbles bigger.
Example Output: strengthener

Example Input: Premise: An older man using a microscope to have more finesse in woodworking.
Hypothesis: man teaches new technique
Update: Nobody is watching the man.
Example Output: weakener

Example Input: Premise: A man in a suit is sitting outdoors and is using his laptop computer.
Hypothesis: The man is reading his email at lunch.
Update: He was surprised to see 20 unread messages.
Example Output:
strengthener