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: Brent was an engineer. Sentence2: Brent had a hobby of making soap. Sentence3: He decided to sell his soap for money. Sentence4: He was wildly successful and went into the soap business. Sentence5: Brent had a great career in the soap business.

Ex Output:
Brent

Ex Input:
Sentence1: Pete worked as a handyman. Sentence2: He got a job doing repairs at an apartment complex. Sentence3: He learned he could get a rent discount if he moved into the complex. Sentence4: He worked there for many years and saved a lot of money. Sentence5: Because of his savings, Pete was eventually able to buy his own home.

Ex Output:
Pete

Ex Input:
Sentence1: John had never wrestled before. Sentence2: He was convinced to join the tournament by his friends. Sentence3: He didn't realize it was meant as a joke. Sentence4: He wound up surviving longer than expected. Sentence5: Now he thinks it's something he wants to pursue.

Ex Output:
John, Friends