Instructions: 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.
Input: Sentence1: Shannon had a lot of pets. Sentence2: One cat in particular shed a lot. Sentence3: She was tired to sweeping up fur. Sentence4: One day, she discovered a huge fur ball on the floor. Sentence5: She snapped and shaved the cat!
Output:
Pets, Shannon, Cat