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: Dan dreaded doing back to school shopping with his kids. Sentence2: However, Dan had to purchase new backpacks and shoes for the kids. Sentence3: Dan decided to go to the mall to get the school shopping done. Sentence4: After looking through several stores, Dan didn't find anything. Sentence5: Dan was disappointed that he did not find anything at the mall.
Output:
Kids, Dan