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: Emma was getting ready to graduate from high school. Sentence2: She wanted to go to college but could not afford it. Sentence3: Her parents were unable to help her financially. Sentence4: Emma received a letter from the scholarship organization. Sentence5: She received the scholarship and was able to attend college.
Example Output: Scholarship organization, Emma, Her parents

Example Input: Sentence1: Jan wanted a new purse. Sentence2: She knew should could not afford the one she wanted. Sentence3: She decided to start saving until she could. Sentence4: Jan finally had enough money. Sentence5: When she went to buy the purse, it was gone.
Example Output: Jan

Example Input: Sentence1: Don was mingling at a black tie party with office people. Sentence2: He was schmoozing the crowd while he decided to take a seat. Sentence3: He forgot he has slipped a champagne flute into his back pocket. Sentence4: When he sat down the glass shattered, splintering into his buttocks. Sentence5: Don was carried out of the high class party on a stretcher.
Example Output:
Don, People