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: John decided he wanted to move to a new state. Sentence2: Before he could move he needed to sell his house. Sentence3: A buyer offered John a good price for his house. Sentence4: John sold the house. Sentence5: He was happy that he could now move to a new state.
Output:
Buyer, John