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.
Q: Sentence1: Rick's kids were nine and eleven. Sentence2: He decided they were old enough to get an allowance. Sentence3: He wanted them to understand the value of money. Sentence4: He assigned them chores each week, then paid them for their work. Sentence5: In this way Rick's kids made money and learned the value of hard work!
A:
Rick's kids, Rick