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.

Ex Input:
Sentence1: Sally was sad that she had no one to spend Christmas with. Sentence2: She decided to spend her holidays make others happy. Sentence3: She went shopping and purchased a bunch of different toys. Sentence4: On Christmas day she went to the children's home. Sentence5: She gave out the presents to the kids and had the best Christmas ever.

Ex Output:
Kids, Sally, Children, Others

Ex Input:
Sentence1: Tim was going to drive a friend home. Sentence2: The friend had too much to drink. Sentence3: He couldn't get the friend's keys to work. Sentence4: The friend was too drunk to help. Sentence5: He had taken the wrong keys by accident.

Ex Output:
Tim, Friend

Ex Input:
Sentence1: Tom was in a big race. Sentence2: He was doing fairly well. Sentence3: He could see the finish line. Sentence4: Right before it he fell down. Sentence5: Tom was able to crawl to fifth place.

Ex Output:
Tom