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: Tony went to the park to see friends. Sentence2: They found an open field to play in. Sentence3: They all played soccer and Tony was the goalie. Sentence4: Tony made a big save to help his team win. Sentence5: All his friends cheered Tony for his great save.
Example Output: Tony, Friends

Example Input: Sentence1: Joe imagined getting rich by finding a priceless pearl. Sentence2: He took his boat to an oyster bed and started looking. Sentence3: He tossed the oysters aside when he found no pearls inside. Sentence4: Hours later, Joe had nothing to show for his troubles. Sentence5: His stomach grumbled and Joe thought of the wasted oysters.
Example Output: Joe

Example Input: Sentence1: Terrence's family was taking the train into the city. Sentence2: It was his cousin's birthday today and they were headed to the party. Sentence3: He liked going to the city to see the large buildings. Sentence4: His parents would argue that the city was no place to raise a child. Sentence5: When they arrived everyone hugged and acted like a happy family.
Example Output:
Terrence's parents, A child, His cousin, Terrence's family

