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: Josh usually drank liquids at his computer desk. Sentence2: But it was always very messy. Sentence3: One day, he tried to reach for his glass of water. Sentence4: But he knocked it off of his desk. Sentence5: The next day, Josh cleaned up his desk.
Output:
Josh