You will be given a definition of a task first, then some input of the task.
In this task, you're given a story (which contains five sentences only). Your task is to find all the characters which are available in the given story.

Sentence1: Jeff brought his kids to the beach one morning. Sentence2: They played in the water, despite dark clouds approaching. Sentence3: Suddenly, a rumble of thunder caught Jeff's attention. Sentence4: He called the kids out of the water as it started pouring rain. Sentence5: Next time, Jeff will check the weather forecast before he goes out.
Output:
Kids, Jeff