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: Frederick wanted to bake a pie for his family. Sentence2: He wasn't particularly great at baking but wanted to give it a try. Sentence3: After preparing the pie he set the timer and put the pie in the oven. Sentence4: Halfway through baking the timer broke and never alarmed. Sentence5: Frederick forgot about the pie and it burned up in the oven.
Output:
Frederick, Family