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: Cat loved bold makeup. Sentence2: She bought some bright red lipstick. Sentence3: She carefully applied it to her lips. Sentence4: Her friends all complimented the look. Sentence5: Cat felt confident and beautiful.

Ex Output:
Friends, Cat

Ex Input:
Sentence1: Nancy had been unhappy in her marriage for many Year's. Sentence2: She knew it was time for a change, but she was afraid of being alone. Sentence3: Finally Nancy decided to divorce her husband. Sentence4: It was hard on both of them, but in the end it was the right thing. Sentence5: Now alone, Nancy is happy that she is no longer with her ex husband.

Ex Output:
Nancy, Nancy's husband

Ex Input:
Sentence1: Jeremy jumped into the water to swim. Sentence2: It was 14 degrees outside, and his first polar plunge. Sentence3: He felt his heart rate rise and his muscles cramp. Sentence4: Stiff as a board he exited the lake. Sentence5: He is still not sure if it was worth it.

Ex Output:
Jeremy