Q: 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.
Sentence1: Jill had a pet cat. Sentence2: Her cat had fleas. Sentence3: The fleas infested her entire house. Sentence4: Jill went to the store and bought salt. Sentence5: She was able to remove the fleas by sprinkling salt on her floors.
A:
Fleas, Jill, Cat