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.

Premise: A boat is illuminated at night.
Hypothesis: A boat is using the lights to see at night.
Update: There is a tug boat pulling up to the boat with men shining lights in to the boat.
weakener

Premise: a girl in a red jacket playing a guitar at a fair or circus.
Hypothesis: The girl makes her living by playing music.
Update: The girl is on stage with a crowd around her
strengthener

Premise: A man looking at a woman looking at water.
Hypothesis: A woman watches the lake while her child swims.
Update: The man can hear a child laughing.

strengthener