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: The Zimmy family took in a kitten they found on the road. Sentence2: The kitten was cute but it had fleas. Sentence3: One day Cayla was petting the kitten and noticed a worm on the cat! Sentence4: The Zimmy family took the cat to the vet's office immediately. Sentence5: The vet said that the kitten ate a flea, and fleas carry parasites.
Output:
Cayla, Zimmy family, The vet, Kitten