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: Maddie really wanted a puppy. Sentence2: Her mom told her if she gets all good grades, she could get one. Sentence3: She worked really hard for three months on her school work. Sentence4: When report cards came out, she had earned all a's and b's! Sentence5: Maddie's mom took her to get her puppy as her reward.

Output: Maddie, A puppy, Her mom

Input: Consider Input: Sentence1: Tyler decided to go to the casino on Saturday. Sentence2: He wanted to mostly play slots. Sentence3: He spent about four hours on slot machines. Sentence4: After losing, he decided to pull more money from his bank account. Sentence5: Overall, he lost one hundred dollars on his casino night.

Output: Tyler

Input: Consider Input: Sentence1: One day a woman was walking down the street. Sentence2: A man ran up behind her and stole her purse. Sentence3: The woman yelled for the police. Sentence4: A police officer heard and ran after the thief. Sentence5: The office apprehended the thief and returned the woman's purse.
Output: A woman, A man, The police