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: Consider Input: Sentence1: Shy was starting college. Sentence2: She was nervous but excited. Sentence3: She wondered if she would like her classes. Sentence4: On her first day, she met many new friends. Sentence5: Shy realized she would love college, after all!

Output: Shy, Friends, College

Input: Consider Input: Sentence1: Tre's bicycle really needed new brakes. Sentence2: Tre saved up all his allowance to take his bike to the shop. Sentence3: On the way a teenager jumped Tre and stole all his money and his bike. Sentence4: Tre walked home crying and empty handed. Sentence5: When he got there he found his mother dead.

Output: A teenager, His mother, Tre

Input: Consider Input: Sentence1: Marie had decided to organize a barbecue. Sentence2: Four cars of friends and family went to the state park. Sentence3: After getting lost and car trouble it was late when they arrived. Sentence4: The food just finished burning as the park was closing. Sentence5: As they ate and ran to the cars a raccoon chased after them.
Output: Raccoon, Marie, Friends, Family