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: Aya was going on her first plane ride. Sentence2: She was heading to her first job in Japan. Sentence3: She was afraid at first. Sentence4: But when she got on the plane she was pleasantly surprised. Sentence5: Flying, she found, was actually delightful!
Example Output: Aya

Example Input: Sentence1: Brittany was planning her wedding. Sentence2: She had been planning it for months. Sentence3: She had the dress and cake. Sentence4: She still did not have a venue. Sentence5: Brittany finally had a venue and her perfect wedding.
Example Output: Brittany

Example Input: Sentence1: Mona wasn't satisfied with how much money she was making. Sentence2: She decided to apply for a new job. Sentence3: She visited a business and asked for work. Sentence4: They told her to apply online. Sentence5: She never heard back from them.
Example Output:
Business, Mona