Q: 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: Jack buys a PS3 on Ebay. Sentence2: When the console arrives it is a PS4, not a PS3. Sentence3: He lets the seller know about the mixup Sentence4: The seller lets Jim keep the more expensive PS4. Sentence5: Jim is glad that his honesty paid off.
A:
Jim, The seller, Jack