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.
Input: 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.
Output:
Friends, Pauly