Definition: 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.
Input: Sentence1: My brother had been feeling sick all day. Sentence2: My mom called the school and told them he wouldn't be able to come in. Sentence3: The teacher gave him all the work he needed. Sentence4: My brother began to do the homework but fell asleep. Sentence5: It is a good thing that he did not have school the next day.
Output:
I (myself), Brother, Mom