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: Randy was out jogging one morning. Sentence2: Then suddenly, the world began to look different. Sentence3: He realized he had lost a contact lens. Sentence4: He went back to check and see if he could find it. Sentence5: Sadly, though, Randy's lens was gone for good.

Ex Output:
Randy

Ex 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.

Ex Output:
Tony, Friends

Ex Input:
Sentence1: Jake was walking along a bike bath. Sentence2: And found a wallet on the floor. Sentence3: He kept the wallet and planned on keeping the money. Sentence4: But farther along the path, someone asked him if he saw a wallet. Sentence5: Jake decided to hand it over.

Ex Output:
Someone, Jake