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: Julie was nervous. Sentence2: The patient beside her was bleeding from a bad needle stick. Sentence3: She hoped that the technician did a better job for her turn. Sentence4: Luckily she had a different technician. Sentence5: It only took two tries for the IV needle to work.
Example Output: Julie, The technician, Patient, Different technician

Example Input: Sentence1: Rick was at a restaurant. Sentence2: And he was curious about how all of the different items tasted. Sentence3: So he ordered way more than he could eat. Sentence4: And he forced himself to finish everything out of guilt. Sentence5: Rick tried to quell his curiosity the next time.
Example Output: Rick

Example Input: Sentence1: Devon woke up feeling terrible, with a stuffy head and sore throat. Sentence2: He wanted to call in sick, but a big meeting was on the books today. Sentence3: He forced himself to go to work, but they weren't happy to see him. Sentence4: His boss ordered him to go home, meeting or no meeting. Sentence5: Devon rested up the rest of the day, knowing they were right.
Example Output:
Devon, Boss