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.
Example: Sentence1: My dog was bored. Sentence2: I was working all day so I couldn't spend time with him. Sentence3: When I finished work I decided to play with my dog. Sentence4: He was so happy to finally have some fun! Sentence5: Alas, he fell sick and died.
Example solution: I (myself), Dog
Example explanation: There is only two characters in given story, i.e., I (myself) and dog.

Problem: Sentence1: Amy was at the gym. Sentence2: She put her towel and water bottle on a machine and tied her shoe. Sentence3: When she stood a man was on her machine. Sentence4: Amy explained she intended to use this machine. Sentence5: The rude man simply ignored Amy and kept working out.

Solution: Amy, Man