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: Three people are listening to a lecture.
Hypothesis: Two women, and a man are seated while listening to a lecture.
Update: All three of the people have either a mustache, beard or both.
Example Output: weakener

Example Input: Premise: A young boy in a black jacket is running towards a woman with outstretched arms.
Hypothesis: A young boy runs to his mother for a hug.
Update: The boy calls the woman 'Mommy'
Example Output: strengthener

Example Input: Premise: A group of people play on bamboo rafts in a waterfall fed pool surrounded by a lush forest.
Hypothesis: People are swimming and diving off of bamboo rafts.
Update: The water is very shallow
Example Output:
weakener