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: Sean woke up one morning comfy in bed. Sentence2: Suddenly he realized that he was almost late for work. Sentence3: He got out of bed thinking it was already hopeless. Sentence4: Still he speed around getting ready quickly. Sentence5: Luckily he made it in time.
Output:
Sean