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: The announcer called out Fran's name. Sentence2: She walked her lamb, Edna, into the small arena. Sentence3: Edna's white coat looked like a giant cotton ball. Sentence4: Fran stopped walking allowing the judges to look over Edna. Sentence5: After the judges handed in their scorecards, Fran exited the arena.

Ex Output:
Announcer, Fran, Edna, Judges

Ex Input:
Sentence1: Jan wanted a new purse. Sentence2: She knew should could not afford the one she wanted. Sentence3: She decided to start saving until she could. Sentence4: Jan finally had enough money. Sentence5: When she went to buy the purse, it was gone.

Ex Output:
Jan

Ex Input:
Sentence1: Tina and her friends had skipped school one day. Sentence2: They were walking through town when a car pulled up. Sentence3: Inside there was a school officer. Sentence4: He made them get in the car and brought them to school. Sentence5: There, they got into huge trouble.

Ex Output:
School officer, Her friends, Tina