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.

Ex Input:
Sentence1: The woman didn't buy food for her children. Sentence2: They were always hungry. Sentence3: One day the youngest child went next door. Sentence4: He asked the neighbors for some food. Sentence5: They all came over and had a feast.

Ex Output:
Neighbors, The woman, Youngest child, Children

Ex Input:
Sentence1: Barry recently had to take a reading test for college. Sentence2: Barry was nervous, as he did not know what was on the test. Sentence3: However, as Barry was taking the test, he realized how much he knew. Sentence4: As the test went along, Barry felt more confident about it. Sentence5: Barry knew that he had passed the reading test he took.

Ex Output:
Barry

Ex Input:
Sentence1: Greg's father loved apple pie on Sunday afternoons. Sentence2: On this Sunday Greg was high on Marijuana and ate his father's pie. Sentence3: His father insisted Greg go buy a new apple pie. Sentence4: On the way, Greg was arrested for driving under the influence. Sentence5: Greg called from the station, but his dad asked about his apple pie!

Ex Output:
Greg, Greg's father