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: I have a daughter who loves to jump. Sentence2: She enjoys trampolines and bouncy houses. Sentence3: She has wanted to go to SkyZone for a long time. Sentence4: Sky Zone is pretty expensive, so she hasn't been able to go. Sentence5: Her friend is having a party at SkyZone and she is thrilled!
Example Output: I (myself), Daughter, Friend

Example Input: Sentence1: My science class took a field trip to the bio park today. Sentence2: Only about half of the students were allowed to go on the trip. Sentence3: My best friend Mark got left behind because he failed a math test. Sentence4: That doesn't seem fair to me because he is really good at science. Sentence5: I don't understand why teachers punish students who really try hard.
Example Output: Students, I (myself), Teachers, Mark

Example Input: Sentence1: John was taking a math test. Sentence2: John took out his study sheet from his bag. Sentence3: John hid the study sheet from others. Sentence4: John was caught cheating. Sentence5: John got a zero on his test and decided not to cheat again.
Example Output:
John, Others