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 am Chinese. Sentence2: One day I was sitting on the bench in front of my building. Sentence3: A young man came by and said I looked like his father. Sentence4: He was white, however, as was his father. Sentence5: He said I just looked like his dad.
Example Output: I (myself), Young man

Example Input: Sentence1: The Smiths love the corn maze. Sentence2: They attended this past year. Sentence3: Helen was very scared. Sentence4: Ethan told her she was okay. Sentence5: They ended up bonding over that.
Example Output: Attended, The smiths, Bonding, Ethan, Helen, Told

Example Input: Sentence1: Molly turned 5 Year's old today. Sentence2: To celebrate the day, her parents took her to the zoo. Sentence3: She has seen many animals in her books but never in person. Sentence4: She loved seeing all of these animals especially the giraffes. Sentence5: This was her best birthday so far.
Example Output:
Animals, Parents, Molly, Giraffes