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.

Example Input: Sentence1: Randy wanted to become a chef. Sentence2: He started taking classes at the local college. Sentence3: They started him out on learning to make salads. Sentence4: He got so good at making salads he started working at a restaurant. Sentence5: He got so good that people from all over came to eat his salads.
Example Output: Randy, Local college, People

Example Input: Sentence1: Sean was in a bad mood. Sentence2: And he realized that his room was a mess. Sentence3: He decided to clean up and organize everything. Sentence4: And his room looked beautiful. Sentence5: And Sean was in a bad mood less often.
Example Output: Sean

Example Input: Sentence1: Tom normally liked flying. Sentence2: His latest trip was different. Sentence3: The plane went through a lot of windy weather. Sentence4: The turbulence was intense enough to make Tom sick. Sentence5: He had to throw up more than once.
Example Output:
Tom