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.

Ex Input:
Sentence1: Jon and his father were going hunting in the woods. Sentence2: They saw a deer through the bushes. Sentence3: Trying to keep quiet, they inched towards it. Sentence4: Jon stepped on a branch, and the deer was scared off. Sentence5: The deer would live another day.

Ex Output:
A deer, Jon, Father

Ex Input:
Sentence1: After failing at employment and education, Mike felt lost. Sentence2: He called his parents for help who told him to move back in. Sentence3: Mike's parents were very worried and decided to send him to therapy. Sentence4: Mike then began to see a psychiatrist a few times a week. Sentence5: After the therapy, Mike began to feel better in life.

Ex Output:
Mike, Mike's parents, Psychiatrist

Ex Input:
Sentence1: Susan was out swimming with friends. Sentence2: They were at a local river. Sentence3: All of a sudden a large gush of water surged through. Sentence4: One of Susan's friend's was washed away. Sentence5: Her body was later discovered.

Ex Output:
Friends, Susan's friend, Susan