Given the task definition and input, reply with output. 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: Tom was reading a new book. Sentence2: He stood up too fast and dropped his glasses. Sentence3: While looking for them he heard a crunch. Sentence4: Tom accidentally stepped on them. Sentence5: They were shattered and he couldn't keep reading.

Tom