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 input: 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 output: I (myself), Dog
Example explanation: There is only two characters in given story, i.e., I (myself) and dog.
Q: Sentence1: Pauly grew up in a small town. Sentence2: After high school he moved away for college and then work. Sentence3: Every holiday Pauly would go back to visit. Sentence4: He would see how much the town had grown and his friends had grown ol. Sentence5: It made him both sad and happy to see all the changes.
A:
Friends, Pauly