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 trying to make copies at work. Sentence2: The printer didn't work. Sentence3: He got frustrated and tried ripping out the ink cartridges. Sentence4: They exploded on him. Sentence5: Tom was covered in ink and had to go home to change.
Tom