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: Clayton was deathly afraid of house centipedes. Sentence2: One day he saw one scuttling around on his floor. Sentence3: Terrified, he called over his roommate to kill it for him. Sentence4: She walked in, unafraid, and swiftly smashed the bug with a book. Sentence5: Clayton was grateful and actually kind of impressed.

Output: Clayton, Roommate

Input: Consider 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.

Output: Kids, Sally, Children, Others

Input: Consider Input: Sentence1: Sally was going to the prom for the first time. Sentence2: She was so excited and could not wait. Sentence3: She wanted her hair to look amazing more than anything. Sentence4: She went to a salon and requested an elegant up-do. Sentence5: When done, Sally looked into the mirror and knew she looked amazing.
Output: Sally