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: Barry took a science class. Sentence2: He didn't expect an essay. Sentence3: He took a test with one. Sentence4: He did his very best. Sentence5: Barry didn't do so well.
Output:
Barry, Science class