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: Jake moved to a new city. Sentence2: It was in an area with tornadoes. Sentence3: Jake had never experienced them before. Sentence4: The first time he had to deal with one was traumatizing. Sentence5: Jake decided to move back.

Ex Output:
Jake

Ex Input:
Sentence1: Pete the clown was such a happy clown. Sentence2: He loved to bring smiles to the people of the rodeo. Sentence3: One day his boss calls him into his office. Sentence4: He tells pete he has to let him go. Sentence5: Pete was a very depressed and sad clown now.

Ex Output:
Pete, Boss, People

Ex Input:
Sentence1: Whitney has a big test tomorrow. Sentence2: Her best friend's birthday is also tonight. Sentence3: She really needs to study. Sentence4: Whitney decided to go to Megan's party. Sentence5: Whitney is going to fail her test.

Ex Output:
Whitney