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.

Example Input: Sentence1: When the little boy went home, he couldn't find his mother or father. Sentence2: He looked all around. Sentence3: He called their names but no one answered. Sentence4: Eventually a neighbor heard him. Sentence5: She said his parents were at her home.
Example Output: Mother, Father, Neighbor, The little boy

Example Input: Sentence1: The tiny black nose was very shiny. Sentence2: The hard plastic was placed over the small downturned mouth. Sentence3: The seamstress looked at the little girl and smiled. Sentence4: She told her it was a sad puppy who needed love. Sentence5: The little girl smiled back and said she would give it love.
Example Output: The little girl, The seamstress, Sad puppy

Example Input: Sentence1: Bill was very poor but tried to provide for his family. Sentence2: He worked extra hours and took a second job. Sentence3: He never seemed to make enough to get ahead though. Sentence4: On Father's day this year he told his family not to get him anything. Sentence5: When he woke up, his family was there with handmade gifts for him.
Example Output:
Bill, Family