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: Fred was going to make sure he didn't end up like his dad. Sentence2: His dad abused his mom and never provided for his family. Sentence3: Fred found a good job and got married. Sentence4: He supported his family and never abused them. Sentence5: Fred was proud of his own accomplishments.
Example Output: His mom, His dad, His family, Fred

Example Input: Sentence1: I was feeling really sick. Sentence2: We were lined up for the bathroom. Sentence3: I sat on the floor. Sentence4: The teacher told me to go to her. Sentence5: I walked up to her and vomited on her feet.
Example Output: I (myself), Teacher

Example Input: Sentence1: Carol went as usual to practice at the indoor gymnasium. Sentence2: She saw a new girl practicing under the guidance of her trainer. Sentence3: She felt irritated, because she wasn't informed about her. Sentence4: The trainer came to her and introduced her to the girl. Sentence5: She couldn't believe that the girl was her childhood friend.
Example Output:
Trainer, Carol, New girl