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 man sits with a little boy in the drivers seat of a jeep.
Hypothesis: Man driving with child on lap.
Update: The jeep's wheels are spinning quickly.
Example Output: strengthener

Example Input: Premise: A kid on a surfboard riding a small wave.
Hypothesis: A kid on a surfboard riding a wave for a competition.
Update: The kid is being cheered on by a large crowd.
Example Output: strengthener

Example Input: Premise: The dog is carrying a pink ball in its mouth.
Hypothesis: A dog is running with a ball.
Update: The dog just saw its owner after being home alone all day.
Example Output:
strengthener