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: A blond boy in a blue t-shirt stands smiling before a craft of green nylon fabric.
Hypothesis: A boy is happy about his fabric choice.
Update: The boy's favorite color is green.
Example Output: strengthener

Example Input: Premise: Tree boys are skating while one takes pictures and a girl looks on.
Hypothesis: The boys are in a race.
Update: The boys are competing for the affection of the girl.
Example Output: strengthener

Example Input: Premise: A man wearing a brightly green camouflage patterned denim jacket and boots walks by a building labeled Lottery Ticket Centre.
Hypothesis: A man just purchased some lottery tickets.
Update: The man is carrying grocery bags.
Example Output:
weakener