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: Today was Fred's first day of high school. Sentence2: He was quite nervous. Sentence3: He was worried he would not make any friends. Sentence4: Luckily when he got there some nice kids started talking to him. Sentence5: Fred was happy he made some friends.

Ex Output:
Kids, Fred

Ex Input:
Sentence1: The family arrives at the beach. Sentence2: Everyone puts on sunscreen. Sentence3: The son plays in the clear water. Sentence4: The daughter builds sand castles. Sentence5: The parents relax for the rest of the day.

Ex Output:
The parents, The daughter, The family, The son

Ex Input:
Sentence1: Jim agreed to babysit his nephew today. Sentence2: He usually wouldn't but he had nothing else to do. Sentence3: They spent the afternoon coloring and playing with toys. Sentence4: Jim told his sister that he would love to babysit again soon. Sentence5: He forgot how much fun it was being a kid!

Ex Output:
Jim, His nephew, His sister