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: Jake fed his cat in the morning. Sentence2: Afterwards he let it outside. Sentence3: The cat roamed outside while he was at work. Sentence4: When he came home he found a dead bird on his driveway. Sentence5: Jake's cat had hunted a bird while he was gone.
Jake, Bird, Cat