Instructions: 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.
Input: Sentence1: Tim's yard would always have trash in it. Sentence2: Wind would bring it around from the neighborhood. Sentence3: After a while Tim got a fence to keep it out. Sentence4: It worked up to a point. Sentence5: Eventually the fence gathered a lot of trash.
Output:
Tim