You will be given a definition of a task first, then some input of the task.
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: Randy was on a low calorie diet. Sentence2: And it made him feel better than ever. Sentence3: But he was used to eating more often. Sentence4: And he lost control after his mom brought home donuts. Sentence5: Randy regret not sticking to his diet plan.
Output:
Randy, Mom