Definition: 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: Bill was quite reckless with his spending last year. Sentence2: Bill accumulated almost $10,000 in credit card debt. Sentence3: Even with making his monthly payments, Bill still owed a lot. Sentence4: Regretfully, Bill decided that he would file for bankruptcy. Sentence5: Bill was saddened that he had to take such a drastic step.
Output:
Bill