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 print some papers. Sentence2: The printer said it was out of ink. Sentence3: Tom was only printing in black and there was plenty left. Sentence4: The printer said it needed yellow ink to continue. Sentence5: Tom never bought that brand of printer again.
Printer, Tom