Detailed Instructions: 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.
Problem:Sentence1: Matt wanted to buy a game but needed money. Sentence2: He came up with an idea of selling used tennis balls. Sentence3: Matt went to the tennis court after dark and collected balls. Sentence4: He posted online that he was selling the balls for a cheap price. Sentence5: A man showed up later and bought the tennis balls from Matt.
Solution:
Matt, Man