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: Jeff needed some new tools. Sentence2: He looked at the prices for tool sets. Sentence3: Jeff found that he could not afford the good tools. Sentence4: However, he could afford low quality tools. Sentence5: After thinking about it, Jeff decided to save his money.
Output:
Jeff